I have a 5906 with Hogue rubber grips. I bought the straight back stock grips. How do I remove the Hogue grips? I found the S&W One Piece Wrap-Around Pistol Grip Disassembly/Assembly Instructions here on the forum so I should be ok once I get the Hogues off. Those directions mention a grip pin. The Hogues have two screws. I took those off but did not know the next step.