I just bought a Beretta 84F from Auction Arms. I got it cheap, but there is a problem. The thumb safety will decock the gun but won't stay engaged (or "click" into disengaged either). I can see that the safety plunger appears to be stuck in the safety lever and not sticking out far enough to hold the safety either up or down. I have tried to get it loose, but it looks like it may be rusted in. I can get a new plunger and spring and even a new lever if neccessary, but I can't figure out how to remove the safety lever. Can anyone tell me how, or direct me to a resource that expains and/or diagrams how to remove the safety lever?