Matine1 - I have the same issue on an 828U. My daughter can't move the safety lever and it takes me some good pushing. I pulled the auto safety as well. Wasn't that. But if you look at the under side of the safety lever with the trigger group out and work it back and forth you can see studs on both sides that ride under spring arms. If you slide those arms to the side the safety switch slides back and forth smoothly as it should. However, they won't stay to the side, so the springs are just too stiff. I'm still trying to figure out if I can just bend them ever so slightly, either to the side or up. I haven't seen any fixes anywhere else.