I recently traded my Pershing, but before that I did several things that helped with the turret rotaion:

Speaker Box - I removed mine, took the speaker out, cut it almost in half, sealed the open side with glue and a sheet of lexan, and then reinstalled it. That gave me some space to move my battery backward and more room for the electronics up front.......and nobody sees the speaker box, anyway.

My turret would push up when the tabs lined up with the gaps on the upper hull and the whole thing would pop loose. I used aluminum tape to seal those holes, once the turret was on so it would stay on better.

I also used glue on the "slipper clutch" part of the turret rotation unit to make it power through the low resistance hang-ups inside the hull, but you might think twice about that since it will no longer allow the turret to be turned manually.

Jason