I have to do it for my 4566. I understand the basic procedure, I just was hoping that someone could tell me the best procedure for seating the rivet. What should I rest the top of the rivet on - a vice?. What should I use to "deform" (for lack of better words) the bottom of the rivet to tighten it - a flat punch? Will I need to adjust the spring or does it usually do its job from the start? Any other tips you can offer? Thanks.