Here's a couple videos of it in action. Are you talking about N scale?http://www.youtube.com/results?search_type=&search_query=kato+sd+40+mrc&aq=f
I recently bought a Kato SD-40-2. I noticed in the recent MR that MRC is offering a sound decoder for this Loco. Considering the mostly negative posts about their decoders should I even consider this unit? Thanks