Thanks for the replies. That's what I needed to know.
Bret: I know the rules, been doing it for over 30 years. Yes, speed on the draw is very importent but you need the retention when walking around. Man of the new plastic holster lock the gun in place. When you are beginning the shoot, you unlock it. I've seen lots of guns drop their gun at this point.
The way I described it is an old rule but I still make my holsters that way.
I too am a revolver shooter. I'm Master Class in Steel Challenge and A in USPSA. Here's one of my finished holsters for matches.