Regards the tail servo movement guys. If you want to experiment a bit just go into the stick section of your 2801pro and set the v200 model to 2801mode, then move into GYROPAT and set your gyro SENS to 25 and see if the the tail servo recentres when you return to 2401mode. I put my Walkera RX into "rate" mode when setting up my CP heli's this way. Then I return them to HH mode with a SENS setting of about 75 on completion. Also if your servo is still buzzing when its moved to the end of its travel I would reduce the rudder EXT a little with the RX POT or risk burning out your servo.
@Mark - thanks for the fuse info