I have Saito 100 on mine,a bit of vibration but I have beefed up fire wall with tri-stock,use 4/40 & HD linkages and 85 oz. servos. It has stayed together without any problems for a year so I think its OK. I always add a little more right thrust(washer)than built in,the problem I have is it needs some up-thrust,I have to hold constant up elev to keep it in a hover. Also, I never go/need full throttle when level.