Yes we did discuss the c&b conversion of Clint's weapon.
I've got one for you. How about a Maynard tape conversion for the Gattling Gun. This would allow you to control the supply much as the Brits did with the Greener police shotgun.
Or even hooking up two Gattling Guns together ala the Calico(?) Two-Twentytwo. Maybe have one Gattling the 10 gauge and the other possibly a 45/70 or even a 50/110, just to be a little more different (and to make it harder for Gunslinger to build