I fully agree about the 81's. Good for throttle, that's it. I have flown a lot of slope combat lately (during winter when I'm not chasin' streamers), and had 81's in my Zagi. I was out at the slope 3 days, and went through 4 sets of gears !! Granted it is full contact, but not all hits were that bad. I would've went to metal gears, but like Hat said, lots of problems with the pots on these servos, so I didn't want to waste the money on the metal gears. So I put in full-size servos. I do use 81's for throttle, and agree that 85's and 225's are good servos.