Hey guys, I've got a wonderful model 19 k-frame which needs a little love. If I pull the trigger double action all the way back... snap... then SLOWLY return it fowards it sometimes hangs up. Maybe 1 in 5 times. When I first obtained the used gun it had some pretty good gunk in the action and I've cleaned it out a few times. The parts are all shiny and nice now, including the recoil slide. There is still a fair amount of rust on the inside of the frame itself. I suspect the recoil slide rubbing against the frame may be causing this binding. I've tried the original spring and a variety of wolff springs. Unfortunately, the strongest wolff spring on the market is still "reduced power". So should I clean up the frame? Any advice on that? Or should I buy another type of spring?