Redesigning my coaches and Loco

I got an order of parts in the mail today, so I was trying to decide how I was going to redesign the coaches since I’m getting a second set pair in the mail soon. I decided to break down the two I had to make them a more realistic length and use the leftover parts to start experimenting with the brake variants compartment end. I also finally put a second train motor in my locomotive, but I need new batteries to see how well they perform because the ones I had in it were already dead from...