Quote Originally Posted by Robinhood View Post
Trial and error is where you are since you lack confidence in a very knowledgeable gunsmith.

Install it where you want. Check function of mag catch/release and bolt operation. Problem, move washer to a different location. Test again. Problem, move washer etc...etc....
My intentions were not to doubt anyone's expertise. I apologize as I am new to this forum and don't know everyone's background. I will follow what sharpshooter has advised.