I think that's the right direction Dave. It would be a good basis for a decent railcar if the bottom down were remixed. It's on my list of things to do too. I suspect you'll get it done before I manage to.I am becoming increasingly despondent with the running gear of this project and, after some research , must agree with Greg, that the chassis is nothing like the type it should be. After mistakenly printing the motors, it is obvious that the design is from an electric powered loco and the sides are far to hefty. I am hoping that, even with my limited experience of CAD programs, I can print something more prototypical, with spoked wheels.
i have an electric motor on order and when it arrives will try to design a better set of running gear for the body...............I may be some time!!
I have mine operating of a fashion but need to wait for the printer to become free now before printing out a remixed chassis to get the top fixed to the existing bogie design (it's at the start of another 20h print at the moment )
3D printed wheels seem fairly slippery for decent traction. I'd opt for some nice delicate G1 spoked wheels to save time and effort and perhaps get a better result? Mine work okay but need some weight over them which this design doesn't have as printed.
I suppose putting some rubber bands on the rims may also help on printed wheels - a small groove could even be designed in to seat them nicely. I've glued my current design together now so that's not an option at present
For what it's worth I've remixed the windscreen as the original one wouldn't print for me, even at high resolutions. I've made the screen available from my TinkerCAD account.