Heres how you can do it at no cost and using a drill bolts and washers.
Drill out the rivets holding the unit on the recoil cover and remove.
Drill out rivet on the arm, then bob the red handle off
You need to get the arm to move freelly so use a bushing, spacer, or what ever you have that wont tighten the arm when bolted (so it moves free) then use a nut and bolt with lock tite on the nut. Make sure it moves free.
Install a cable connector for the cable and have a washer on each end so it slides up and down freely and connect your return spring to that.
You may have to slightly bend the arm that goes to the gov.
Bolt unit back on where it was riveted and lock tite.
Hope this makes sence, very easy and works like the mini bike unit. :thumbsup: