Originally Posted by SlowerOne

Running a 6.5 on 38mm/rev (sintered rotor) without a receiver pack, I haven't had a single glitch from my Spektrum. I notice that people who have issues with Spektrum also seem to run digital servos, so maybe this is another source of current drain? I use a 9602.

A receiver pack doesn't seem to be mandatory with BL, but it does help if you find the car slows up during the last couple of minutes, but the pack has charge left, or if you get any glitching from the Spektrum. HTH

My LRP Sphere 2007 is hot to the touch after a race (see motor and gearing details above) - not measured it by it is slightly hotter than the motor, or a charged pack of cells. No issues though, it just runs and runs and... HTH