The museum in Clarksville has two layouts tended by a small volunteer group. The HO/N layout has a loop of Marklin M-track (I think) in the center. They have had considerable problems keeping the Marklin locos running. They are small 2-6-0's, IIRC (great detail memory). One was sent to Marklin for repair and lasted about 2 months (so they say). They get run mainly on Sundays for 3-4 hours. I know there are a few Marklin (Maerklin) users here, and would appreciate any advice. I'm doing some track cleaning and it seems to help; one will run fairly well, one just stutters around. The lights flicker a lot, indicating pickup problems, I would guess. Are there disassembly drawings available, and is this even recommended? I expect they need some cleaning and lubing, but they were donated to the museum. If they were mine, I'd tear into 'em, but I'm approaching this with a little more caution. I e-mailed Marklin USA about 3 weeks ago, just because I wanted the REAL pronunciation, but no response yet. I've heard it as "MARK-lin", MERK-lin", and as "MARE-klin" or "MEHR-klin", which I suspect is close to correct. Anyhow, any responses welcomed!!