I ran the buggy again sunday late in the day. Ran it as hard as I could for 25 minutes straight. Temps were great. At the end of the run the heatsink was 132* and the board where the motors wire come out were actually 5 degrees cooler than the heatsink. I've never seen that before. I'm really happy with it so far.

Here is a picture of the buggy. The Quark is mounted upside down and also I threw in a picture of the open ends of the Neu motor, which I later taped up.