For me, the higher the money investment I have in a plane will in turn cause me to use higher quality components such as hardware, servos, etc. Even though high end components can fail, I just don't feel comfortable risking a high dollar plane with cheap gear. I wouldn't put $125.00 servos in a .40 trainer and I wouldn't put $25.00 servos in a $1,500.00 plane. That's how I look at it.