I am putting together a chicken power recoil. I have the spring in and I put the rope threw the hole in the spool and tie a small knot in it on the side the spring goes on the spool. I put a roune piece looks like cardboard on the spool and I fix it so the knot lies on top of the round paper piece but when I put everything in the housing the recoil rubbs but if I remove the paper piece it works find. What am I missing thanks.