Thanks all for the replies so far. In no particlular order, yes I could of paid someone to do this, but what fun is that ? I already have a second set of barrels so I am going to try again. I know I could of had the hook welded up on the first set, but like I said a set of barrels is $59 from Numrich.
Hi David. I believe the firing pins will line up fine (I think that's what you meant when you said c/c ??) The breech/monobloc is the same dimensions in both the 12 ga barrels and the 20 ga barrels. I thought about trying to make the new hook match the old hook with some sort of template, but I have to brainstorm that one more.
If anyone else has any ideas I'd love to hear them. In the mean time I'm going to find a file the same dimension as the hinge pin (or as close as possible) and begin taking the hook back little by little.
Thanks for the input
Vince