Have old 1981 daisy 880 that I'm trying to restore. Didn't have a safety. Ordered daisy safety button kit with ball and spring but doesn't seem to work. If I put the spring in the trigger guard, the safety will slide but then the ball will push up into the hole in the safety and then just bend the spring when I try to move it back. I'm thinking this can't be original design. Also doesn't clear the firing piece that it is supposed to engage. Hope that all makes sense. Please let me know if anyone can tell me if design has changed and are old buttons out there. Thanks.