I don't know about yokes and triggers and drop zone scopes origins, but I do know that in Oct 2005, I sent Bill T a prototype of the rf mount they brought out last year at ATA show along w/ a letter that started out: "I know you are far too busy to play games like I've got a Secret".......

Two thingsI learned about Bill T is he's a savvy businessman and an honest one. He's kept his deal w/ me to the letter.