I feel like this is a stupid question but i can't figure it out. I have a gen 1 stacatto p duo and decided to pick up gen 2 duo but it looks like the stock rear plate is removed differently than the gen 1. I removed the little screw in front of the rear sight but the plate is not budging. Am i missing something? The gen 1 had to two visible screws on top of the plate to remove so it was easy. Thanks for any help!