First, I guarantee you this can't be ripped off the belt. Paracord 550 is ridiculously tough. I've been carrying with the mk1 and then mk2 with my 42oz gun for well over three months now and since I came up with the tapered cinch strap I've had zero slippage. It's far more secure on the belt than any plastic rig and some kydex rigs.
The versions I do for DA trigger revolvers and any autopistol cover the triggerguard. Here are the two rigs I've made for free so far for friends:
Ruger P85-Mk2, basically a full-size "wondernine" class auto, DA/SA, safety/decocker combo means first shot has to be DA, 4" barrel. Note how high up this is: the whole triggerguard is above the beltline.
And this is a 3" barrel S&W 66-3, a really sweet gun. That said, this design I'm working on appears best suited for big guns and I probably won't do another piece this small again.
I'm not near able to do a "pro grade" rig yet, this is still "alpha testing". But with some better tools and what I'm learning at
http://leatherworker.net/forum/index.php?showforum=29 I can see turning semi-pro at some point, specializing in rigs for bigger CCW pieces.
The open-triggerguard option is something I would ONLY do on an SA revolver that has a transfer-bar safety such as a Ruger, Beretta or Taurus Gaucho. And I'd cover the triggerguard as an option for those that would want it.
The part I hope to standardize across all types is this "totally flexible mounting system" as seen in the drawing.