Thanks for the advice Larry, I'm not sure what you mean by "phasing" the transformers together, but I'll did into it. ..and that leads me to another question, when purchasing transformers do they all have to match in wattage? I've seen several used on auction sites thats reasonable, but haven't pulled the trigger yet because I don't know exactly what I need yet. I've read that multiple power blocks set up in your configuration is the way to do this, and inexpensive phone wire for the entire loop, If I understand what I'm reading right, I'm going to need a transformer for every 10-12 feet of track? thats a butload of transformers! ..and in your personal opinion would you stay away from "used" and just by new? wattage? brand?