Finishing up my JS-2 build and I've run into a BIG problem. I have no barrel recoil. Everything else works fine, there is cannon sound and barrel flash, and barrel elevation also works. Here is what I did, pulled trim down, pulled right stick down, gun fires-flash no recoil and I can see the gears coming from the recoil motor spinning but the large gear isn't. I did that twice and now the recoil motor won't spin but the flash and sound are still there. So some questions for you. Now that the turret is glued together, what do I do. I've checked for any obstructions, wires etc and I can't see anything. I see sites sell replacement units, but how do you change them out with the turret glued together? Thanks for the help guys, everything was going great until now.