diff --git a/Models/Instruments/IESI/IESI.nas b/Models/Instruments/IESI/IESI.nas
index 47563c50..85258f17 100644
--- a/Models/Instruments/IESI/IESI.nas
+++ b/Models/Instruments/IESI/IESI.nas
@@ -2,147 +2,167 @@
 
 # Copyright (c) 2020 Josh Davidson (Octal450)
 
-var IESI = nil;
-var IESI_display = nil;
-var elapsedtime = 0;
-var ASI = 0;
-var alt = 0;
-var altTens = 0;
-var airspeed_act = 0;
-var mach_act = 0;
-
 # props.nas nodes
 var iesi_init = props.globals.initNode("/instrumentation/iesi/iesi-init", 0, "BOOL");
 var iesi_reset = props.globals.initNode("/instrumentation/iesi/att-reset", 0, "DOUBLE");
-var iesi_brt = props.globals.getNode("/controls/lighting/DU/iesi", 1);
-var iesi_rate = props.globals.getNode("/systems/acconfig/options/iesi-rate", 1);
-var et = props.globals.getNode("/sim/time/elapsed-sec", 1);
-var aconfig = props.globals.getNode("/systems/acconfig/autoconfig-running", 1);
-
-var airspeed = props.globals.getNode("/instrumentation/airspeed-indicator/indicated-speed-kt", 1);
-var mach = props.globals.getNode("/instrumentation/airspeed-indicator/indicated-mach", 1);
-var pitch = props.globals.getNode("/instrumentation/iesi/pitch-deg", 1);
-var skid = props.globals.getNode("/instrumentation/iesi/slip-skid", 1);
-var altitude = props.globals.getNode("/instrumentation/altimeter/indicated-altitude-ft", 1);
-var altitude_ind = props.globals.getNode("/instrumentation/altimeter/indicated-altitude-ft-pfd", 1);
-
-var altimeter_mode = props.globals.getNode("/instrumentation/altimeter[0]/std", 1);
-var qnh_hpa = props.globals.getNode("/instrumentation/altimeter/setting-hpa", 1);
-var qnh_inhg = props.globals.getNode("/instrumentation/altimeter/setting-inhg", 1);
 
+var ASI = 0;
 var _showIESI = 0;
 var _fast = 0;
 var _IESITime = 0;
 
-var canvas_IESI_base = {
-	init: func(canvas_group, file) {
-		var font_mapper = func(family, weight) {
+var canvas_IESI = {
+	new: func(svg, name) {
+		var obj = {parents: [canvas_IESI] };
+		obj.canvas = canvas.new({
+			"name": "IESI",
+			"size": [1024, 1024],
+			"view": [1024, 1024],
+			"mipmapping": 1,
+		});
+		
+		obj.canvas.addPlacement({"node": "iesi.screen"});
+        obj.group = obj.canvas.createGroup();
+		
+		obj.font_mapper = func(family, weight) {
 			return "LiberationFonts/LiberationSans-Regular.ttf";
 		};
 		
-		canvas.parsesvg(canvas_group, file, {"font-mapper": font_mapper});
-		
-		var svg_keys = me.getKeys();
-		foreach(var key; svg_keys) {
-			me[key] = canvas_group.getElementById(key);
-			var svg_keys = me.getKeys();
+		canvas.parsesvg(obj.group, svg, {"font-mapper": obj.font_mapper} );
+ 		foreach(var key; obj.getKeys()) {
+			obj[key] = obj.group.getElementById(key);
+			
+			var clip_el = obj.group.getElementById(key ~ "_clip");
+			if (clip_el != nil) {
+				clip_el.setVisible(0);
+				var tran_rect = clip_el.getTransformedBounds();
 
-			foreach (var key; svg_keys) {
-				me[key] = canvas_group.getElementById(key);
-
-				var clip_el = canvas_group.getElementById(key ~ "_clip");
-				if (clip_el != nil) {
-					clip_el.setVisible(0);
-					var tran_rect = clip_el.getTransformedBounds();
-
-					var clip_rect = sprintf("rect(%d,%d, %d,%d)", 
-					tran_rect[1], # 0 ys
-					tran_rect[2], # 1 xe
-					tran_rect[3], # 2 ye
-					tran_rect[0]); #3 xs
-					#   coordinates are top,right,bottom,left (ys, xe, ye, xs) ref: l621 of simgear/canvas/CanvasElement.cxx
-					me[key].set("clip", clip_rect);
-					me[key].set("clip-frame", canvas.Element.PARENT);
-				}
+				var clip_rect = sprintf("rect(%d,%d, %d,%d)", 
+				tran_rect[1],
+				tran_rect[2],
+				tran_rect[3],
+				tran_rect[0]);
+				obj[key].set("clip", clip_rect);
+				obj[key].set("clip-frame", canvas.Element.PARENT);
 			}
-		}
+		};
+		obj.AI_horizon_trans = obj["AI_horizon"].createTransform();
+		obj.AI_horizon_rot = obj["AI_horizon"].createTransform();
 		
-		me.AI_horizon_trans = me["AI_horizon"].createTransform();
-		me.AI_horizon_rot = me["AI_horizon"].createTransform();
+		obj.middleAltOffset = nil;
+		
+		obj.update_items = [
+			props.UpdateManager.FromHashValue("airspeed", nil, func(val) {
+				# Subtract 30, since the scale starts at 30, but don't allow less than 0, or more than 520 knots
+				if (val <= 30) {
+					ASI = 0;
+				} else if (val >= 520) {
+					ASI = 490;
+				} else {
+					ASI = val - 30;
+				}
+				obj["ASI_scale"].setTranslation(0, ASI * 8.295);
+			}),
+			props.UpdateManager.FromHashList(["altitude","altitude_ind"], nil, func(val) {
+				if (val.altitude > 50000) {
+					val.altitude = 50000;
+				} elsif (val.altitude < -2000) {
+					val.altitude = -2000;
+				}
+				
+				if (val.altitude < 0) {
+					obj["negText"].show();
+					obj["negText2"].show();
+				} else {
+					obj["negText"].hide();
+					obj["negText2"].hide();
+				}
+				
+				obj.altOffset = (val.altitude / 500) - int(val.altitude / 500);
+				obj.middleAltText = roundaboutAlt(val.altitude / 100);
+				if (obj.altOffset > 0.5) {
+					obj.middleAltOffset = -(obj.altOffset - 1) * 258.5528;
+				} else {
+					obj.middleAltOffset = -obj.altOffset * 258.5528;
+				}
+				
+				obj["ALT_scale"].setTranslation(0, -obj.middleAltOffset);
+				obj["ALT_scale"].update();
+				obj["ALT_five"].setText(sprintf("%03d", abs(obj.middleAltText+10)));
+				obj["ALT_four"].setText(sprintf("%03d", abs(obj.middleAltText+5)));
+				obj["ALT_three"].setText(sprintf("%03d", abs(obj.middleAltText)));
+				obj["ALT_two"].setText(sprintf("%03d", abs(obj.middleAltText-5)));
+				obj["ALT_one"].setText(sprintf("%03d", abs(obj.middleAltText-10)));
+				
+				
+				if (val.altitude < 0 and val.altitude_ind > 20) {
+					val.altitude_ind = 20;
+				} elsif (val.altitude > 0 and val.altitude_ind > 500) {
+					val.altitude_ind = 500;
+				}
+				
+				obj["ALT_digits"].setText(sprintf("%s", val.altitude_ind));
+				obj["ALT_meters"].setText(sprintf("%5.0f", math.round(val.altitude * 0.3048, 10)));
+				obj.altTens = num(right(sprintf("%02d", val.altitude), 2));
+				obj["ALT_tens"].setTranslation(0, obj.altTens * 3.16);
+			}),
+			props.UpdateManager.FromHashValue("mach", nil, func(val) {
+				if (val >= 0.5) {
+					obj._machWasAbove50 = 1;
+					obj["ASI_mach_decimal"].show();
+					obj["ASI_mach"].show();
+				} elsif (val >= 0.45 and obj._machWasAbove50) {
+					obj["ASI_mach_decimal"].show();
+					obj["ASI_mach"].show();
+				} else {
+					obj._machWasAbove50 = 0;
+					obj["ASI_mach_decimal"].hide();
+					obj["ASI_mach"].hide();
+				}
+				
+				if (val >= 0.999) {
+					obj["ASI_mach"].setText("99");
+				} else {
+					obj["ASI_mach"].setText(sprintf("%2.0f", val * 100));
+				}
+			}),
+			props.UpdateManager.FromHashValue("pitch", nil, func(val) {
+				obj.AI_horizon_trans.setTranslation(0, val * 16.74);
+			}),
+			props.UpdateManager.FromHashValue("roll", nil, func(val) {
+				obj.AI_horizon_rot.setRotation(-val * D2R, obj["AI_center"].getCenter());
+				obj["AI_bank"].setRotation(-val * D2R);
+			}),
+			props.UpdateManager.FromHashValue("skid", nil, func(val) {
+				obj["AI_slipskid"].setTranslation(val, 0);
+			}),
+			props.UpdateManager.FromHashList(["altimeter_mode","qnh_hpa","qnh_inhg"], nil, func(val) {
+				obj.updateQNH(val);
+			}),
+		];
 		
 		_showIESI = 0;
 		_fast = 0;
 		_IESITime = 0.0;
+		obj._cachedInhg = nil;
 		
-		me.page = canvas_group;
-		
-		return me;
-	},
-	getKeys: func() {
-		return [];
-	},
-	update: func() {
-		cur_time = et.getValue();
-		# todo consider relay 7XB for power of DC HOT 1
-		# todo transient max 0.2s
-		# todo 20W power consumption
-		if (iesi_reset.getValue() == 1) {
-			if (iesi_init.getBoolValue() and _IESITime + 90 >= et.getValue()) {
-				_fast = 1;
-			} else {
-				_fast = 0;
-			}
-			iesi_init.setBoolValue(0);
-		}
-		
-		if (systems.ELEC.Bus.dcEss.getValue() >= 25 or (systems.ELEC.Bus.dcHot1.getValue() >= 25 and airspeed.getValue() >= 50 and cur_time >= 5)) {
-			_showIESI = 1;
-			IESI.update();
-			
-			if (aconfig.getValue() != 1 and iesi_init.getValue() != 1) {
-				iesi_init.setBoolValue(1);
-				if (_fast) {
-					_IESITime = cur_time - 80;
-					_fast = 0;
-				} else {
-					_IESITime = cur_time;
-				}
-			} else if (aconfig.getValue() == 1 and iesi_init.getValue() != 1) {
-				iesi_init.setBoolValue(1);
-				_IESITime = cur_time - 87;
-			}
-		} else {
-			_showIESI = 0;
-			iesi_init.setBoolValue(0);
-		}
-		
-		if (_showIESI and iesi_brt.getValue() > 0.01) {
-			IESI.page.show();
-		} else {
-			IESI.page.hide();
-		}
-	},
-};
-
-var canvas_IESI = {
-	new: func(canvas_group, file) {
-		var m = {parents: [canvas_IESI, canvas_IESI_base]};
-		m.init(canvas_group, file);
-		m._cachedInhg = -99;
-		m._machWasAbove50 = 0;
-		m._roll = 0;
-		return m;
-	},
+		return obj;
+	},	
 	getKeys: func() {
 		return ["IESI","IESI_Init","ASI_scale","ASI_mach","ASI_mach_decimal","AI_center","AI_horizon","AI_bank","AI_slipskid","ALT_scale","ALT_one","ALT_two","ALT_three","ALT_four","ALT_five","ALT_digits","ALT_tens","ALT_meters","QNH_setting","QNH_std","negText","negText2","AI_bank_scale"];
 	},
-	update: func() {
-		if (qnh_inhg.getValue() != me._cachedInhg) {
-			me._cachedInhg = qnh_inhg.getValue();
-			me.updateQNH();
+	update: func(notification) {
+		if (notification.qnh_inhg != me._cachedInhg) {
+			me._cachedInhg = notification.qnh_inhg;
+			me.updateQNH(notification);
 		}
 		
-		if (_IESITime + 90 >= et.getValue()) {
+		me.updatePower(notification);
+		if (me.group.getVisible() == 0) {
+			return;
+		}
+		
+		if (_IESITime + 90 >= notification.elapsed_seconds) {
 			me["IESI"].hide(); 
 			me["IESI_Init"].show();
 			return;
@@ -151,137 +171,119 @@ var canvas_IESI = {
 			me["IESI"].show();
 		}
 		
-		# Airspeed
-		# Subtract 30, since the scale starts at 30, but don't allow less than 0, or more than 520 knots
-		airspeed_act = airspeed.getValue();
-		mach_act = mach.getValue();
-		if (airspeed_act <= 30) {
-			ASI = 0;
-		} else if (airspeed_act >= 520) {
-			ASI = 490;
-		} else {
-			ASI = airspeed_act - 30;
-		}
-		me["ASI_scale"].setTranslation(0, ASI * 8.295);
-		
-		if (mach_act >= 0.5) {
-			me._machWasAbove50 = 1;
-			me["ASI_mach_decimal"].show();
-			me["ASI_mach"].show();
-		} elsif (mach_act >= 0.45 and me._machWasAbove50) {
-			me["ASI_mach_decimal"].show();
-			me["ASI_mach"].show();
-		} else {
-			me._machWasAbove50 = 0;
-			me["ASI_mach_decimal"].hide();
-			me["ASI_mach"].hide();
-		}
-		
-		if (mach_act >= 0.999) {
-			me["ASI_mach"].setText("99");
-		} else {
-			me["ASI_mach"].setText(sprintf("%2.0f", mach_act * 100));
-		}
-		
-		# Attitude
-		me._roll = pts.Orientation.roll.getValue();
-		me.AI_horizon_trans.setTranslation(0, pitch.getValue() * 16.74);
-		me.AI_horizon_rot.setRotation(-me._roll * D2R, me["AI_center"].getCenter());
-		
-		me["AI_slipskid"].setTranslation(skid.getValue(), 0);
-		me["AI_bank"].setRotation(-me._roll * D2R);
-		
-		# Altitude
-		me.altitude = altitude.getValue();
-		if (me.altitude > 50000) {
-			me.altitude = 50000;
-		} elsif (me.altitude < -2000) {
-			me.altitude = -2000;
-		}
-		
-		if (me.altitude < 0) {
-			me["negText"].show();
-			me["negText2"].show();
-		} else {
-			me["negText"].hide();
-			me["negText2"].hide();
-		}
-		
-		me.altOffset = me.altitude / 500 - int(me.altitude / 500);
-		me.middleAltText = roundaboutAlt(me.altitude / 100);
-		me.middleAltOffset = nil;
-		if (me.altOffset > 0.5) {
-			me.middleAltOffset = -(me.altOffset - 1) * 258.5528;
-		} else {
-			me.middleAltOffset = -me.altOffset * 258.5528;
-		}
-		me["ALT_scale"].setTranslation(0, -me.middleAltOffset);
-		me["ALT_scale"].update();
-		me["ALT_five"].setText(sprintf("%03d", abs(me.middleAltText+10)));
-		me["ALT_four"].setText(sprintf("%03d", abs(me.middleAltText+5)));
-		me["ALT_three"].setText(sprintf("%03d", abs(me.middleAltText)));
-		me["ALT_two"].setText(sprintf("%03d", abs(me.middleAltText-5)));
-		me["ALT_one"].setText(sprintf("%03d", abs(me.middleAltText-10)));
-		
-		me.altitudeText = altitude_ind.getValue();
-		if (me.altitude < 0 and me.altitudeText > 20) {
-			me.altitudeText = 20;
-		} elsif (me.altitude > 0 and me.altitudeText > 500) {
-			me.altitudeText = 500;
-		}
-		
-		me["ALT_digits"].setText(sprintf("%s", me.altitudeText));
-		me["ALT_meters"].setText(sprintf("%5.0f", math.round(me.altitude * 0.3048, 10)));
-		altTens = num(right(sprintf("%02d", me.altitude), 2));
-		me["ALT_tens"].setTranslation(0, altTens * 3.16);
+		foreach(var update_item; me.update_items)
+        {
+            update_item.update(notification);
+        }
 	},
-	updateQNH: func() {
-		if (altimeter_mode.getBoolValue()) {
+	updateQNH: func(notification) {
+		if (notification.altimeter_mode) {
 			me["QNH_setting"].hide();
 			me["QNH_std"].show();
 		} else {
-			me["QNH_setting"].setText(sprintf("%4.0f", qnh_hpa.getValue()) ~ "/" ~ sprintf("%2.2f", qnh_inhg.getValue()));
+			me["QNH_setting"].setText(sprintf("%4.0f", notification.qnh_hpa) ~ "/" ~ sprintf("%2.2f", notification.qnh_inhg));
 			me["QNH_setting"].show();
 			me["QNH_std"].hide();
 		}
-	}
+	},
+	updatePower: func(notification) {
+		# todo consider relay 7XB for power of DC HOT 1
+		# todo transient max 0.2s
+		# todo 20W power consumption
+		if (notification.attReset == 1) {
+			if (notification.iesiInit and _IESITime + 90 >= notification.elapsed_seconds) {
+				_fast = 1;
+			} else {
+				_fast = 0;
+			}
+			iesi_init.setBoolValue(0);
+		}
+		
+		if (notification.dcEss >= 25 or (notification.dcHot1 >= 25 and notification.airspeed >= 50 and notification.elapsed_seconds >= 5)) {
+			_showIESI = 1;
+			if (notification.acconfig != 1 and notification.iesiInit != 1) {
+				iesi_init.setBoolValue(1);
+				if (_fast) {
+					_IESITime = notification.elapsed_seconds - 80;
+					_fast = 0;
+				} else {
+					_IESITime = notification.elapsed_seconds;
+				}
+			} else if (notification.acconfig == 1 and notification.iesiInit != 1) {
+				iesi_init.setBoolValue(1);
+				_IESITime = notification.elapsed_seconds - 87;
+			}
+		} else {
+			_showIESI = 0;
+			iesi_init.setBoolValue(0);
+		}
+		
+		if (_showIESI and notification.iesiBrt > 0.01) {
+			me.group.setVisible(1);
+		} else {
+			me.group.setVisible(0);
+		}
+	},
 };
 
-setlistener("sim/signals/fdm-initialized", func {
-	IESI_display = canvas.new({
-		"name": "IESI",
-		"size": [1024, 1024],
-		"view": [1024, 1024],
-		"mipmapping": 1
-	});
-	IESI_display.addPlacement({"node": "iesi.screen"});
-	var group_IESI = IESI_display.createGroup();
-	
-	IESI = canvas_IESI.new(group_IESI, "Aircraft/A320-family/Models/Instruments/IESI/res/iesi.svg");
-	
-	IESI.updateQNH();
-	
-	IESI_update.start();
-	if (iesi_rate.getValue() > 1) {
-		rateApply();
-	}
-});
+var IESIRecipient =
+{
+	new: func(_ident)
+	{
+		var IESIRecipient = emesary.Recipient.new(_ident);
+		IESIRecipient.MainScreen = nil;
+		IESIRecipient.Receive = func(notification)
+		{
+			if (notification.NotificationType == "FrameNotification")
+			{
+				if (IESIRecipient.MainScreen == nil) {
+						IESIRecipient.MainScreen = canvas_IESI.new("Aircraft/A320-family/Models/Instruments/IESI/res/iesi.svg", "A320 IESI");
+				}
+				
+				#if (!math.mod(notifications.frameNotification.FrameCount,2)){
+					IESIRecipient.MainScreen.update(notification);
+				#}
+				return emesary.Transmitter.ReceiptStatus_OK;
+			}
+			return emesary.Transmitter.ReceiptStatus_NotProcessed;
+		};
+		return IESIRecipient;
+	},
+};
 
-setlistener("/instrumentation/altimeter[0]/std", func() { if (IESI != nil) { IESI.updateQNH(); } }, 0, 0);
+var A320IESI = IESIRecipient.new("A320 IESI");
+emesary.GlobalTransmitter.Register(A320IESI);
 
-var rateApply = func {
-	IESI_update.restart(0.05 * iesi_rate.getValue());
+var input = {
+	"acconfig": "/systems/acconfig/autoconfig-running",
+	"airspeed": "/instrumentation/airspeed-indicator[0]/indicated-speed-kt",
+	"altitude": "/instrumentation/altimeter/indicated-altitude-ft",
+	"altitude_ind": "/instrumentation/altimeter/indicated-altitude-ft-pfd",
+	"altimeter_mode": "/instrumentation/altimeter[0]/std",
+	"attReset": "/instrumentation/iesi/att-reset",
+	"dcEss": "/systems/electrical/bus/dc-ess",
+	"dcHot1": "/systems/electrical/bus/dc-hot-1",
+	"iesiBrt": "/controls/lighting/DU/iesi",
+	"iesiInit": "/instrumentation/iesi/iesi-init",
+	"mach": "/instrumentation/airspeed-indicator/indicated-mach",
+	"pitch": "/instrumentation/iesi/pitch-deg",
+	"qnh_hpa": "/instrumentation/altimeter[0]/setting-hpa",
+	"qnh_inhg": "/instrumentation/altimeter[0]/setting-inhg",
+	"roll": "/orientation/roll-deg",
+	"skid": "/instrumentation/iesi/slip-skid",
+};
+
+foreach (var name; keys(input)) {
+	emesary.GlobalTransmitter.NotifyAll(notifications.FrameNotificationAddProperty.new("A320 IESI", name, input[name]));
 }
 
-var IESI_update = maketimer(0.05, func {
-	canvas_IESI_base.update();
-});
-
 var showIESI = func {
-	var dlg = canvas.Window.new([256, 256], "dialog").set("resize", 1);
-	dlg.setCanvas(IESI_display);
+	var dlg = canvas.Window.new([512, 512], "dialog").set("resize", 1);
+	dlg.setCanvas(A320IESI.MainScreen.canvas);
 }
 
+setlistener("", func() { if (A320IESI.MainScreen != nil) { A320IESI.MainScreen.updateQNH(notification); } }, 0, 0);
+
 var roundabout = func(x) {
 	var y = x - int(x);
 	return y < 0.5 ? int(x) : 1 + int(x);
diff --git a/Models/Instruments/Upper-ECAM/Upper-ECAM.nas b/Models/Instruments/Upper-ECAM/Upper-ECAM.nas
index 00bdfe9c..505e5826 100644
--- a/Models/Instruments/Upper-ECAM/Upper-ECAM.nas
+++ b/Models/Instruments/Upper-ECAM/Upper-ECAM.nas
@@ -68,6 +68,7 @@ var canvas_upperECAM = {
 				obj[key].set("clip-frame", canvas.Element.PARENT);
 			}
 		};
+		
 		canvas.parsesvg(obj.test, "Aircraft/A320-family/Models/Instruments/Common/res/du-test.svg", {"font-mapper": obj.font_mapper} );
 		foreach(var key; obj.getKeysTest()) {
 			obj[key] = obj.test.getElementById(key);
@@ -451,8 +452,6 @@ var canvas_upperECAM = {
 		obj["ECAMR7"].setFont("LiberationMonoCustom.ttf");
 		obj["ECAMR8"].setFont("LiberationMonoCustom.ttf");
 		
-		obj.page = obj.group;
-		
 		# cache
 		obj._cachedN1 = [nil, nil];
 		obj._cachedN2 = [nil, nil];
@@ -1090,7 +1089,7 @@ var showUpperECAM = func {
 }
 
 setlistener("/systems/electrical/bus/ac-ess", func() {
-	A320EWD.MainScreen.powerTransient();
+	if (A320EWD.MainScreen != nil) { A320EWD.MainScreen.powerTransient() }
 }, 0, 0);
 
 var slatLockTimer = maketimer(0.50, func {