Well I made the cut in a 38 special cylinder and it works. I can get the cylinder off the yoke with grips with a cut out. As pull the cylinder back you can tilt it farther away from the frame. One thing I did have to do is ramp the cut where the cylinder stop rides as the stop would of course pop up and hit the side of the slot, a bit of a polished ramp there and the stop rides up and over then pops into the next lead in and lock it correctly. I have to decide if I want to put the slot on a 9mm K frame cylinder I made so I can use it or the 38 cylinder. I don't think I will. It was just an idea that I wanted to see if it would work and it does.
I'll take a couple pictures later. I have been busy making a Damascus/Oosic chefs knife for a friend. Blade is 11" long 2+" deep and 17" overall. 1095/15N20 raindrop Damascus with a 1095 core. The black is from a big sheet of carbon fiber composite that was made for the Stealth Fighters.