>>9380259>How do i insulate my wheels from each other and/or the main chassis?You put plastic isolators between the axis shaft and the wheel hub or between the wheel and tire in every wheel of ONE side, this way that side wheels or tires are, say, Vcc and the whole locomotive body is Ground, or vice-versa, and you are not shorting the rails. You could put isolators in every wheel too, if you prefer?
There are many videos about locomotive kit building online. This one is damn long but as detailed as one could possibly want. Image quality is a little lacking due to the age of the video, but is most excellent content:
https://www.youtube.com/watch?v=a1DGQsXapFkThere are other videos by the same guy with further detailing and painting information, if you like that slow but absolute in depth approach.
Scratchbuilding is hardcore, but basically you would have to produce the same kind of parts as seen in kit building videos, so watch them anyway.
Also, check this scratchbuilding video, you can probably pick a lot of ideas from it, even if it is not the kind of train you want to build:
https://www.youtube.com/watch?v=uVnWuuhVako 
