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@Adolf Hamsterokay so I believe I found out what the issue was with the rifle. It had nothing to do with the shimming, which fair enough was a bit high anyways. Had nothing to do with a motor dying, or a piston too long. IT WAS THE BATTERY. The battery's C value was too high, I swapped down to a 20C and now it's working 100%. The battery I had was a 45C battery, which the hobby shop nearby had lead me to believe was fine.

@Adolf Hamsterseems to be working for me…

@Adolf Hamster @concretesnail 65892146246__08971080-1D28-414A-A0CB-0995085F6489.MOV @Adolf Hamster @concretesnail note though, it doesn’t consistently lock up in the same place. Sometimes it will lock up further back. I don’t have precocking on, I’ve tried enabling it and I’ve tried turning on and turning off active breaking.

@concretesnail @Adolf Hamster so I got the sound sorted out, I haven’t had a chance to test if the motor is still overheating. the shimming was tight, and that is sorted out now I believe, but the mosfet is still switching off for some reason. Edit: that is, it’s switching off the battery and blinking red light coming from the mosfet indicating some type of motor block. Really frustrated. I think the stock piston was a 14T, and I put a 15T piston in. Could that be an issue?

@Adolf HamsterApologies, I didn't receive any notifications so I assumed my post got ghosted. The tech did mention he shimmed it quite high because he was forced to make a decision to either shim it too tight or too loose, so he chose to shim it too tight. The red blinking light says "Blocked Motor" on my end, but I suppose it can be interpreted the same way. It does get super super hot when using it for a little while, so that sounds consistent with shimming it too tightly, yes?

Hi there, I recently put a new piston (15T Steel SHS) and a new piston head (Maxx CNC Aluminum double o-ring), along with a Perun V2 Hydrid drop in mosfet. The tech who worked on the rifle did the shimming, and said he was forced to shim it a little bit high for one reason or another, but I got it back and did some testing. It's making a very high pitched whine when firing, and in auto it's very high pitched. (Can attach video if necessary.) When firing in auto, occasionally it will just stop and have a flashing red light coming from the mosfet, which is a "blocked motor" according to the mosfet's programming aide. Could this be that the motor is old and dying? Could the high shimming have caused it? Please help, as I don't want to spend money on a new HT Motor for no reason. Thanks in advance! NOTE: To my knowledge, the only modifications that have been done are the ones listed above, and a 6.01 tight bore. The rest is all stock.