I am working on a Savage 1907 that a guy fired and the slide locked up on. I got everything apart and used a dental tool to hold the sear down so I could remove the slide. Everything on this gun is extremely worn. The sear was wore to nothing. I found a used one and then had a friend who is an expert is welding and has his own guns to weld up the edge of the slide where it was completely worn away. I used my jewelry files to restore the edge and now can get it to slide. Now that I am able to get it to slide it will not fire. Besides replacing anything is there something I am missing that is keeping the gun from firing once I got the sear to stay where it belongs.?