Hi, Rusty,
Safety aside, something you said on the original posting could use a comment. You don't slip hammer off the web of the hand, as you can't do this without losing grip on the gun (also it hurts like hell). You slip hammer off the side of the thumb, which still allows a pretty good grip.
I would never do it today, but I used to start thumbing at the same time as I started the draw, so the hammer was back and ready to let go when the gun came on target. Did the same with a regular SAA type and also on DA draw with S&W Combat Magnum (later Model 19); the hammer was always coming back while the gun was coming out of the holster and on to the target, so the hammer dropped just as the gun lined up.
Today, I would get run off a range for doing this stuff, and rightly so. Also, again as I get older, I become more devoted to keeping all my bits and pieces intact.
Jim