So what I've done is upgraded my wire harness to the 18" cable but really didn't need it but still using it, ran it into the buffer tube hooked it to the FCU and folded it back into the buffer tube. Then using a battery extension cable like what I sent to you I plugged that into the FCU and ran it into the stock. So now the only bit I move is he battery. FCU is nice and safe.Where have you run your FCU, into the stock?
On my first P* I cut out the stock same as people do when they run lipo's in the tube.
It's really annoying the FCU cable is so short and theres not enough give to push it into tube, I'm worried I'll break it lol