I am planning on expanding my current 4' X 8' layout by adding a 2' X 8' section. Does anyone know of a way that I can determine if my NCE Powercab will be able to power the proposed addition. My turnouts on the present 4 X 8 are Atlas remote snap switches powered by a separate power source. I plan on doing the same thing with the turnouts on the addition. Is there a "rule of thumb" pertaining to the amount of track I have or the length of the BUS that can tell me if I will have to buy a power booster for the addition? Of course I can always just wait until the addition is done to the point of where I wire it into the existing BUS.