The time has come to retire my trusty, and heavy duratrax esc. what are peoples opinions on these esc's.
qc2 small, light
gtx small, light (without the capacitor)
sphere competition bigger, heavier, but with brushless capabilities

do all of these require a capacitor for 4 cell? does the sphere require the heatsink for brushed use? from what I understand the qc3 is pretty much the same as the qc2, with lipo capability.
How are people mounting their servos flat and still running a servo saver? mine (older digi ko) will need to be shimmed up 1/8" to clear, is there a certain servo saver that is smaller?

Thanks