I spent a little extra time making a wire harness to put the whole pack in parallel for initial balance. I plan on building more cars, and this should speed the 'next time' a little. Still takes a surprising amount of time to bolt everything down and be VERY CAREFUL not to short across any terminals along the way. My little Mastech power supply can only put out 10.5 amps max, and this pack will take a little over 10kWhr to bring up to 'full', so its going to take days...