Here is what I did to my 'Quark', if you want to call it that anymore. I used some flattened copper tube as buss bar and soldered 6 extra caps directly to the board. After I did that, I got magic-Mike the make me a FET clamp to squeeze the FETs with thermal paste (AS-5), and mounted it to a large heatsink for great cooling.... a little overkill, yes.... do I regret it, never!
Anyways, it runs even better now with these mods to it, smoother (if that's possible), I can't even try to make it cog, it seems like a sensored brushless system now. It stays super cool running 7s2p A123 (equal 6s lipo) on a Neu 1512 3D (1700Kv.), and it has got awesome power with power readings on Eagletree of 2100 watt spikes. The motor gets up to 160F at the end of a 30 min runtime.
EDIT: I also got my caps from AAngel. A group purchase sorta.