I have been flying my Ultra Flash with a JetsMunt M140xbl for the past 3 years with Bihotec C40 Elecrtic Retracts and brakes. I'm using a shared battery 2s LiPo with the ECU without a single problem. Hundreds of flights. I also have had the retracts "overamped" since at times I have had too high of a speed after takeoff and the gear got stuck in halfway retracted position. Cycling the gear retracts them without issues after slowing down a bit. I just did not want to use another battery. I also thought of adding a schottky diode between the retract controller and battery but did not want any lower voltage since I'm already using a 2s LiPo (3s is recommended).