I'm just building my first right now, and boy ... am I having to use my brains on this one. Firstly, G&P's CD instructions is worthless, with photos only and no documentation.
As far as I can figure is that the machining if off by may be between 1/100 ~ 15/100 of inch. approx. So their sample used for their photos shows great fit. But in reality, the latch mechanism's plunger (or whatever you call it) doesn't extend deep enough to slide into the index holes.
What I did to get it to work better (still not perfect), is to shim the seating of the receiver with some double sided tape (didn't remove the top layer), so the receiver rides upwards by that 1/100~15/100". Then I tried to increase the spring pressure. The proper way would be to find a stiifer spring, but you would have to match the size. So, I just rigged a piece of plastic off of a pen plus a metal washer. Then for the release button, I found a piece of wood to act as a dowell and stuck it into the plastic finger with a hole in it then sanded it down to the right length.
Seems to work better .... I having to learn as I go here. There were a lot of information and tips G&P should have told us, e.g. pre-drilling the holes in the shrouds meant for those silver metal pins to connect the two halves to make them go in easier and come apart easier. Otherwise it's harder than hell to take the shrouds apart for repair or fiddeling.
