I have built one of these, glow with a Saito 4 stroke. I originally used HS-81's on ailerons, but then changed to HS-225MG's after reading a lot about these particular servos and this plane. I never flew it with the HS-81's so I can't comment on their power/durability. I decided that it was cheap insurance to go with the HS-225MG's and use the HS-81's for throttles, retracts, etc. For rec's, I use to use a lot of Hitec electron-6 because they are dual conversion. Now I'm using R606FS (Futaba 2.4SS).