diff --git a/src/LGraphNode.ts b/src/LGraphNode.ts
index ab89c9dfe..afc2a2636 100644
--- a/src/LGraphNode.ts
+++ b/src/LGraphNode.ts
@@ -815,7 +815,7 @@ export class LGraphNode implements Positionable, IPinnable, IColorable {
    * @param slot
    * @param data
    */
-  setOutputData(slot: number, data: unknown): void {
+  setOutputData(slot: number, data: number | string | boolean | { toToolTip?(): string }): void {
     if (!this.outputs) return
 
     // this maybe slow and a niche case
diff --git a/src/LLink.ts b/src/LLink.ts
index 8fde39c4a..8be1894a4 100644
--- a/src/LLink.ts
+++ b/src/LLink.ts
@@ -1,4 +1,3 @@
-// @ts-strict-ignore
 import type {
   CanvasColour,
   LinkNetwork,
@@ -46,9 +45,9 @@ export class LLink implements LinkSegment, Serialisable<SerialisableLLink> {
   /** @inheritdoc */
   _centreAngle?: number
 
-  #color?: CanvasColour
+  #color?: CanvasColour | null
   /** Custom colour for this link only */
-  public get color(): CanvasColour {
+  public get color(): CanvasColour | null | undefined {
     return this.#color
   }
 
@@ -108,7 +107,9 @@ export class LLink implements LinkSegment, Serialisable<SerialisableLLink> {
     network: LinkNetwork,
     linkSegment: LinkSegment,
   ): Reroute[] {
-    return network.reroutes.get(linkSegment.parentId)
+    if (!linkSegment.parentId) return []
+    return network.reroutes
+      .get(linkSegment.parentId)
       ?.getReroutes() ?? []
   }
 
@@ -125,7 +126,9 @@ export class LLink implements LinkSegment, Serialisable<SerialisableLLink> {
     linkSegment: LinkSegment,
     rerouteId: RerouteId,
   ): Reroute | null | undefined {
-    return network.reroutes.get(linkSegment.parentId)
+    if (!linkSegment.parentId) return
+    return network.reroutes
+      .get(linkSegment.parentId)
       ?.findNextReroute(rerouteId)
   }
 
diff --git a/src/Reroute.ts b/src/Reroute.ts
index 520086a4f..18ff5da4c 100644
--- a/src/Reroute.ts
+++ b/src/Reroute.ts
@@ -1,4 +1,3 @@
-// @ts-strict-ignore
 import type {
   CanvasColour,
   LinkSegment,
@@ -31,12 +30,12 @@ export class Reroute implements Positionable, LinkSegment, Serialisable<Serialis
 
   #parentId?: RerouteId
   /** @inheritdoc */
-  public get parentId(): RerouteId {
+  public get parentId(): RerouteId | undefined {
     return this.#parentId
   }
 
   /** Ignores attempts to create an infinite loop. @inheritdoc */
-  public set parentId(value: RerouteId) {
+  public set parentId(value) {
     if (value === this.id) return
     if (this.getReroutes() === null) return
     this.#parentId = value
@@ -98,16 +97,22 @@ export class Reroute implements Positionable, LinkSegment, Serialisable<Serialis
   /** @inheritdoc */
   get origin_id(): NodeId | undefined {
     // if (!this.linkIds.size) return this.#network.deref()?.reroutes.get(this.parentId)
-    return this.#network.deref()
-      ?.links.get(this.linkIds.values().next().value)
-      ?.origin_id
+    const nextId = this.linkIds.values().next().value
+    return nextId === undefined
+      ? undefined
+      : this.#network.deref()
+        ?.links.get(nextId)
+        ?.origin_id
   }
 
   /** @inheritdoc */
   get origin_slot(): number | undefined {
-    return this.#network.deref()
-      ?.links.get(this.linkIds.values().next().value)
-      ?.origin_slot
+    const nextId = this.linkIds.values().next().value
+    return nextId === undefined
+      ? undefined
+      : this.#network.deref()
+        ?.links.get(nextId)
+        ?.origin_slot
   }
 
   /**
@@ -200,6 +205,7 @@ export class Reroute implements Positionable, LinkSegment, Serialisable<Serialis
     if (this.#parentId === withParentId) return this
     if (visited.has(this)) return null
     visited.add(this)
+    if (this.#parentId === undefined) return
 
     return this.#network
       .deref()
@@ -279,7 +285,7 @@ export class Reroute implements Positionable, LinkSegment, Serialisable<Serialis
    */
   draw(ctx: CanvasRenderingContext2D): void {
     const { pos } = this
-    ctx.fillStyle = this._colour
+    ctx.fillStyle = this._colour ?? "#18184d"
     ctx.beginPath()
     ctx.arc(pos[0], pos[1], Reroute.radius, 0, 2 * Math.PI)
     ctx.fill()
diff --git a/src/interfaces.ts b/src/interfaces.ts
index 324614763..d94ff2bf3 100644
--- a/src/interfaces.ts
+++ b/src/interfaces.ts
@@ -128,9 +128,9 @@ export interface LinkSegment {
   _centreAngle?: number
 
   /** Output node ID */
-  readonly origin_id: NodeId
+  readonly origin_id: NodeId | undefined
   /** Output slot index */
-  readonly origin_slot: number
+  readonly origin_slot: number | undefined
 }
 
 export interface IInputOrOutput {