been flying my mxs a few months now and im tired of 3 minute flights on reccomeded 2200 mah 3s packs. tried some 3000 mah packs and not much improvement. i want to try a 4s pack but since i cant find motor specs anywhere i dont know if it will handle a 4s pack with a 60 amp e.s.c. any body flying theirs on 4s ? thanks.