Heliguy Forum - RC heli forum

couple questions. one, i'm wondering if people think my gyro might be bad. i have horrible servo drift. i have watched the bob finless setup video, and set it up, but i have to trim out the drift before every battery change, and gets progressively worse through the flight. within a couple minutes i cant hold it anymore and have to land to re-perform the trimming procedure. i get about 10 min per battery, and halfway through i have to stop to re-trim because its so bad the servo will race all the way to the end of travel. this gyro is the eflight G90, it came off my blade cp pro, where it seemed to do fine(of course that's a tail motor and not belt drive). should note it has been through a couple relatively jarring crashes. I am just looking to see if you guys think it might be bad, or is something else, before i go and replace it. --i'm thinking of telebee, a lot of people seem to like them and its cheaper then i paid for the eflight.
second unrelated question. i know the king v3 is fairly new, but wondering if anyone knows if some parts will fit the v2? mainly stuff like the tail boom, i know the helicopter is longer, but whats the width of the boom(8mm i think the v2 is). i kinda like the blue tail boom, and if its the same width might try fitting it to my heli.
any help is appreciated, happy flying.
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HBK2
JGF 400DH motor, 8t pinion, CC 25 amp esc.
G90 HL gyro
Microheli blue cnc tail case.
Microheli blue cnc main hub and grips.
xtreme 43t pulley.
xtreme 10t tail shaft.
Futaba 7C 2.4 radio.
blade cp pro
stock except for Futaba 7C 2.4 radio