Happy Labor Day weekend all... I've got some time to do a little maintainance on my two oldest Altas HO scale Geeps. As I have never had the wheels off before, I was wondering if the experts here could give me a few pointers. One Geep, an IC gp38, seems to need a wheel gauge adjustment, as my template rocks onto the wheel sets pretty tight compared to all my other locos. Another reason why I diagnose this one as needing a wheelbase length adjustment is it will occasionally derail. My other locos do not. How 'bout a step by step for that proceedure, or maybe there is a website out there that shows it? The other Geep, a BN gp40, ALWAYS needs cleaning. Once around the track and the wheels are gunked up. All my other locos need cleaning about once a month. I figure this "dirty" one has pitted wheels, or poor plating or something. Do I need to replace the wheels? It is my oldest, but I only purchased it about 18 months ago. Thanks for taking the time to read and respond!