That is a good point on the drive line tearing things up. I did not think of that. I would like to make the undercarriage so that the hydro unit was not dealing with most of the side load from the tracks while turning. The hydro would only be doing the driving of the tracks. Now, I think, this is more of a long term project than anything. Maybe start within a year from now, but research, parts, and ideas are what I am after right now. I was honestly thinking of making the bogie wheels myself and drive wheels. I am running into issues with trying to find a track that would work. I would like to find something in the neighborhood of a width of 12" and a ground contact size of 30" with a height of 24". I believe that will keep it close to scale. Any ideas on measurements would be more than welcome.