I have a REVO 3.3 (5309). I was wondering what is a good throttle servo. The stock servo (PN# 2056) was starting to jitter. I thought that it might have been the opti drive so I bypassed it and got the same result. My LHS didn't have any of the 2056 in stock so they sold my the 2055. Installed it and about a 1/2 gallon later the same thing started happening. Is my opti drive causing me to go through these servos?