[lincpimp]

The quark esc are good, but you have to run a bec on anything over 2s lipo. I say this because the esc has marginal cooling at best. The internal bec will produce heat on 3s lipo and up. So the external bec will help it out. Using some thermal epoxy to stick a heatsink on the bottom is a good ideal. I usually ziptie mine tightly to the al chassis, but I plan to glue an al plate to the bottom, so I can mount it to the chassis with bolts. I have had great succes with my quark escs. I have 2 125b, 1 65, 1 80 air, and 1 125 air. I did fry a 65 a few months back, and have no idea what I did, but it was running 6s in an 1/8 buggy!