i have been using a couple of s9451 futaba servos in my 6 and 6t for throttle for quite some time and had no problems at all,but i see the hv servos gaining popularity and hitec and jr seem to be the most popular. the only reason i purchased the airtronics servos was the great deal with the trade in. my debate is should i sell the new digital airtronics servos or keep them. several years ago the 94359 & 94360 where the cats meow, but i hardly see anyone run airtronics servos anymore ( except maifield and cavalieri ).