Since I've totally forgotten what I was doing, I've decided to go over Rush Hour once again, looking for evidence of my shame.
Everything compiles without error with the latest changes, but I need to execute the new image to truly confirm this.
That means I need to make a disk image. Hopefully that tool was left in good shape.
Unfortunately, no. The resulting disk will not load in E/A, and crashes Disk Manager. That's bad.