just my opion but i say u need something with atleast 150 oz on the thrt.. Ive one jr servo that was 125 it burnt up in my floor. then i went to the airtroniccs 94358 200oz its not a cheap servo but all 5 of my buddies run them and have been for a yr and no problems. then i got buddies with all kinds of problems with servos that only have 125oz.. buy good servo set it up right there will be no problems... good luck man...