good brushless setup advice

[BrianG]

The "p" depends on what Ah and C the individual cells are. If a single cell has enough Ah and C rate, it will work just fine. Let's say you want an 80A constant discharge rate and have 4Ah cells, you'd need a solid 20C rating to get 80A. If they're only 10 or 15c, you might want to go with a different cell that has a higher Ah and/or C rating.

The Quark can get warm depending on what you are running for a motor, gearing, weight, etc. Usually, just an added heatsink is enough, but the sink in the RCM store also has taps to screw on some 40mm fans if it's not enough. I've only used heatsinks (not the one in the RCM store though) and it has been plenty to kepp it cool enough (~130-140*F).

Just wire up the BEC wires along with the ESC power wires on the Deans plug.