Thanks for the info, indeed it is so marked on the engine. Found out last night with the dual MRC transformer connected speed was sluggish, but when I added an LGB transformer (small grey unit); (3 units total) it took off like a scalded hound, well maybe a beagle tracking a rabbit. Very acceptable but I am not sure about the consequences of hooking 3 transformers to the track. I believe my wiring is adequate, it is 2 16 or 18 ga wire running to each rail (4 per track) and a 20 foot run. I have cleaned and physically buffed the tires with a Dremel fine grit buffing wheel If it would help I could measure track voltage with and without load. Also could probably get the amperage under load. I would like to figure out wha'sup rather than throwing transformers at it.