One of the things I don\'t like about the RGG build is the role pins. It makes it hard to remove the main recoil plate. If you don\'t have everything rite the first time then you have to drive then out and back in. You can wind up with a mess if you have trouble getting them in and out a few times. And I want to modify my cocking ring so the firing pin screw will more easly clear when the cocking switch is retracted. I also need to add a .01 shim under the mount for the worm gear. I used a key & key way for the main shaft drive gear and a spacing coller to hold the gear in place. I\'ll post a picture later so all this will make scence.