I think you answered your own statement. HS-81's broke on a sixty size plane. On throttle that would be OK. Not on control surfaces of a standard size .60 size plane. Yes they will get you thru a few flights however once you start pulling some G's they will fail. I have used the following set-ups to save on weight. The following setups - HS-81 on throttle and HS-225(Nylons they have better resolution when centering then the Metal gear) on all control surfaces on theses planes, the Tower Uproar, Sig Fazer and all Q-500 planes which reach 100 to 105 Mph.