Replacement gears 13 June, 2016 by RCExplorer - David You asked for it, so we got it. A replacement gear set for the BMS-210DMH servo is now available. To take the servo apart you need a tiny T5 torx screwdriver. So we got some of those as well. Lastly a 430mm 4 Lead servo extension for extending the servo cable on the Tricopter V4 in a very clean and professional looking manner.