diff --git a/src/conductor.ts b/src/conductor.ts
index 78cc547361..e2a785f96d 100644
--- a/src/conductor.ts
+++ b/src/conductor.ts
@@ -351,7 +351,7 @@ export class Conductor extends EventEmitter {
 			let getFilteredLayers = (layers: TimelineState['LLayers'], device: Device) => {
 				let filteredState = {}
 				_.each(layers, (o: TimelineResolvedObject, layerId: string) => {
-					const oExt = o as TimelineResolvedObjectExtended
+					const oExt: TimelineResolvedObjectExtended = o
 					let mapping: Mapping = this._mapping[o.LLayer + '']
 					if (!mapping && oExt.originalLLayer) {
 						mapping = this._mapping[oExt.originalLLayer]
diff --git a/src/devices/atem.ts b/src/devices/atem.ts
index abc32ab7c9..3ce14a1b91 100644
--- a/src/devices/atem.ts
+++ b/src/devices/atem.ts
@@ -186,9 +186,9 @@ export class AtemDevice extends DeviceWithState<DeviceState> {
 		_.each(sortedLayers, ({ tlObject, layerName }) => {
 			const tlObjectExt = tlObject as TimelineResolvedObjectExtended
 			const content = tlObject.resolved || tlObject.content
-			let mapping = this.mapping[layerName] as MappingAtem
+			let mapping = this.mapping[layerName] as MappingAtem // tslint:disable-line
 			if (!mapping && tlObjectExt.originalLLayer) {
-				mapping = this.mapping[tlObjectExt.originalLLayer] as MappingAtem
+				mapping = this.mapping[tlObjectExt.originalLLayer] as MappingAtem // tslint:disable-line
 			}
 
 			if (mapping) {
diff --git a/src/devices/casparCG.ts b/src/devices/casparCG.ts
index ce542f2449..d7bdad0d2b 100644
--- a/src/devices/casparCG.ts
+++ b/src/devices/casparCG.ts
@@ -216,6 +216,7 @@ export class CasparCGDevice extends DeviceWithState<TimelineState> {
 		const caspar = new StateNS.State()
 
 		_.each(timelineState.LLayers, (layer: TimelineResolvedObject, layerName: string) => {
+			// tslint:disable-next-line
 			const layerExt = layer as TimelineResolvedObjectExtended
 			let foundMapping: Mapping = this.mapping[layerName]
 			if (!foundMapping && layerExt.isBackground && layerExt.originalLLayer) {
@@ -308,6 +309,7 @@ export class CasparCGDevice extends DeviceWithState<TimelineState> {
 					stateLayer = l
 				} else if (layer.content.type === TimelineContentTypeCasparCg.ROUTE) {
 					if (layer.content.attributes.LLayer) {
+						// tslint:disable-next-line
 						let routeMapping = this.mapping[layer.content.attributes.LLayer] as MappingCasparCG
 						if (routeMapping) {
 							layer.content.attributes.channel = routeMapping.channel
diff --git a/src/devices/httpSend.ts b/src/devices/httpSend.ts
index 8396ca6b4f..d8035af37f 100644
--- a/src/devices/httpSend.ts
+++ b/src/devices/httpSend.ts
@@ -151,7 +151,7 @@ export class HttpSendDevice extends DeviceWithState<TimelineState> {
 				// added!
 				commands.push({
 					commandName: 'added',
-					content: newLayer.content as HttpSendCommandContent,
+					content: newLayer.content as HttpSendCommandContent, // tslint:disable-line
 					context: `added: ${newLayer.id}`
 				})
 			} else {
@@ -160,7 +160,7 @@ export class HttpSendDevice extends DeviceWithState<TimelineState> {
 					// changed!
 					commands.push({
 						commandName: 'changed',
-						content: newLayer.content as HttpSendCommandContent,
+						content: newLayer.content as HttpSendCommandContent, // tslint:disable-line
 						context: `changed: ${newLayer.id}`
 					})
 				}
@@ -173,7 +173,7 @@ export class HttpSendDevice extends DeviceWithState<TimelineState> {
 				// removed!
 				commands.push({
 					commandName: 'removed',
-					content: oldLayer.content as HttpSendCommandContent,
+					content: oldLayer.content as HttpSendCommandContent, // tslint:disable-line
 					context: `removed: ${oldLayer.id}`
 				})
 			}
diff --git a/src/devices/hyperdeck.ts b/src/devices/hyperdeck.ts
index 253c1f78b9..2af1bb51c7 100644
--- a/src/devices/hyperdeck.ts
+++ b/src/devices/hyperdeck.ts
@@ -173,7 +173,7 @@ export class HyperdeckDevice extends DeviceWithState<DeviceState> {
 
 		_.each(sortedLayers, ({ tlObject, layerName }) => {
 			const content = tlObject.resolved || tlObject.content
-			const mapping = this.mapping[layerName] as MappingHyperdeck
+			const mapping = this.mapping[layerName] as MappingHyperdeck // tslint:disable-line
 
 			if (mapping) {
 				switch (mapping.mappingType) {
diff --git a/src/devices/lawo.ts b/src/devices/lawo.ts
index 33b64f52f9..edc43735d2 100644
--- a/src/devices/lawo.ts
+++ b/src/devices/lawo.ts
@@ -220,7 +220,7 @@ export class LawoDevice extends DeviceWithState<TimelineState> {
 		const lawoState: LawoState = {}
 
 		_.each(state.LLayers, (tlObject: TimelineObjLawo, layerName: string) => {
-			const mapping: MappingLawo | undefined = this.mapping[layerName] as MappingLawo
+			const mapping: MappingLawo | undefined = this.mapping[layerName] as MappingLawo // tslint:disable-line
 			if (mapping && mapping.identifier && mapping.device === DeviceType.LAWO) {
 
 				if (tlObject.content.type === TimelineContentTypeLawo.SOURCE) {
diff --git a/src/devices/panasonicPTZ.ts b/src/devices/panasonicPTZ.ts
index f05bb2c8b5..f1c766f3f8 100644
--- a/src/devices/panasonicPTZ.ts
+++ b/src/devices/panasonicPTZ.ts
@@ -118,7 +118,7 @@ export class PanasonicPtzDevice extends DeviceWithState<TimelineState> {
 		const ptzState: PanasonicPtzState = this._getDefaultState()
 
 		_.each(state.LLayers, (tlObject: TimelineResolvedObject, layerName: string) => {
-			const mapping: MappingPanasonicPtz | undefined = this.mapping[layerName] as MappingPanasonicPtz
+			const mapping: MappingPanasonicPtz | undefined = this.mapping[layerName] as MappingPanasonicPtz // tslint:disable-line
 			if (mapping && mapping.device === DeviceType.PANASONIC_PTZ) {
 				if (mapping.mappingType === MappingPanasonicPtzType.PRESET) {
 					let tlObjectSource = tlObject as TimelineResolvedObject & TimelineObjPanasonicPtzPreset