I tested the smoke and coupler functions a few hours ago. Everything is working great and nothing put out the magic smoke, here are some videos showcasing everything working
Second video mainly is to show the smoke output from the stack. I put back the gasket material around the funnel to help guide the smoke out of the stack, making sure it has a bit of pressure on the funnel. In my earlier testing I saw some of the smoke was going in the shell from the small gaps next to the exit hole of the smoke unit, this doesn't appear to be happening with the gasket in place.
I would show final pictures of the electronics setup, but I got way ahead of myself and put all the handrails back on. So that might have to come another day. Although I think I got plenty of pictures showcasing how I laid everything out in the shell.
Last step I need to do is paint the replacement brake wheel I got, but I will need to make a trip to my local hobby shop to get silver spray paint. Could paint it up with my paint pens, but I don't think that will last or look that great.