I have a Citori XT Trap from Millers in DE. I am sick and tired of having to remove the butt plate to make an adjustment. Also, this thing loosens up at random times and this has me losing my mind. I am looking at Graco hardware and it looks like the 420 is a direct fit kit. Some drilling is required for the comb adjustment screws and the posts. They do have a drill jig for a nominal additional cost I plan to get. My question is has anyone done this themselves and if so was it fairly straightforward? Thanks