You will find that the Redhawk hammer is three times harder than the hubs of hell and doesn't weld easily. Back in the '80s I wanted to lighten my hammer to speed up the lock time. After smokin' a cobalt bit and then a carbide one, I finally had it EDM'd. Same with the trigger trying to drill for an overtravel screw. I finally silver brazed a piece of brass welding rod to the back of it and filed it down to adjust.
Gee, maybe a big gob of JB Weld with some checkering. Good Luck.
Short barrel beat me to it. Never had him do a RH hammer
but did have him weld up and make a target trigger for
a Python I had. Nice work. He is known for his welding.
A chemist by training if I recall.