Gentlemen, thank you all. The problem turned out to be that the spring I got from Numrich was the wrong one, I got the correct one from Brownells, part num 215770000. It went in with no problems and the gun is now fixed. (I'll manage to screw it up again, though) Brownells also carries the (assembled) MIM hammer/sear aqssembly and that would have been my next step. In any case you guys set me on the right track. I.m very grateful.
Dawg
Dawg