Ok, here's a bit of research for those interested... There has been plenty of mention in various topics of the difference between the speeds of different locomotives at the same throttle position*. Has anyone actually looked at the gear ratios and into the possibility of swapping out gears between the brands that have the same truck set-ups? I mean between Kato, Atlas, and the newer LL (GP20 and SW) units with low-friction trucks. I recall an article or two in a couple of early N Scale magazines regarding this, but that was with the available locos in the late 80's and early 90's. I realise this could go as far as the differences between the motors themselves - different windings = different speeds at the same voltage - so maybe someone has done a motor swap between the brands since the units mentioned above are of similar design. Just a thought... Gary. *NOTE I'd like to keep this a non-DCC specific question. No need to add "with DCC you can..." discussion as we mostly know that you can tune the throttle response with DCC. ------------------ Gary A. Rose The Unofficial TC&W page N to the Nth degree!