Whoa mbboy take a chill. you're like comparing apples to apples when the unwired tools kit is an ACC Upgrade kit. so, its just that.. a rebuilt servo is worth and the UT kit is more $ bc it is more than just the servo. it also replaces the "amplifier". Even if you get a new aluminum servo other parts of the system can still break down. So, UT kit seemed like a better route to me. Also, do you think a piece of machined aluminum cost $400? Each is more than just a sum of their physical parts.