After reading all Buckstix's posts on the rifle, I didn't get the impression he was taking credit for doing all the research. I even went back and re-read it after your post. He even says that a lot of the research was already done in his OP. He may not have mentioned the person responsible for doing the research but I didn't read it as anything other than Buckstix relaying the story of a cool old rifle that he bought.
From Buckstix OP:
Back in 2013 while I was searching high and low for a 577 BPE to add to my collection, I ran across a "story" from early in 2001. It was about a rifle that had all the things that everyone wants in a fine double rifle. I call them the "Lucky Seven". Here they are, not neccessarily in any order.
