If it helps anyone plan, here is my "JR" version showing height. The trucks are regular MTH Railking ones and the plastic base is .4mm plastic. I should have put it on track to get a better picture but I didn't think of that at the time and when I did I didn't want to disturb the adhesive as I just applied it and it hadn't cured yet. I can do it with track after I'm comfortable handling it.
- walt
This is an MTH portal: