Howdy. Long time lurker, first time poster. I want to get the Power Custom Bisley hammer kit and modified transfer bar for the New Model Single Six .22LR. Is this a simple parts swap or is there fitting involved? Do I have to modify the frame at all? Do I have to get the free spin pawl as well? I have read through a lot of old threads on this. I just need it all clarified before I drop that kind of money. Thanks.