Mark - very nice job on the cars. I have a quick question on the lights - if you run TMCC, that's constant track voltage - so your LED lighting circuit relies on the voltage regulator to keep the voltage to 9 v on the LED's, right? If you were to run conventional, then at lower voltages, the regulator doesn't have any effect up to 9v?
I also noticed on the observation car you had lit marker lights - also LED?