This might be common knowledge but I had to learn the hard way. This was on my 4046.The Wolf recoil springs has a small end and a large end un-like the factory spring. Well you can guess witch way I had put it on. It was not until I saw small metal shavings on the guide rod before I had figure it out. Know I have a guide rod with a new shallow groove it in almost the length of the rod. I buffed it out, probably wont effect anything. Live and learn.

Jason