If anyone here would like a good read on geometry of parts. The Shop Manuals written by the late Jerry Kuhnhausen are outstanding. I don't know if his manual for the Rem 870/1100/11-87 cover triggers but, if you read through his works on the Colt 1911, 1911A1 and Commercial copies it will be a wakeup call to how mechanisms work. And the photos are amazing. Jerry milled hundreds of guns apart to show the inner workings and put the photos to page so we could grasp and understand the working geometry of the parts. Once you grasp the relationship of the parts, it doesn't matter what name is stamped on it.
John
