Thanks Jaybee yeah ur wiring is a bit simpler to understand. i use plugs though and dont direct solder. I mite have to change looking at the way u guys set up ur cars as i have wires going everywhere . wouldnt it be a hassle to change your batteries over though? and also the wires in between the cells i would have thought u would have them on the outside of the centre spring so it is easier to take the batteries out, otherwise u have to unclip the centre spring everytime.