The problem I found with 1911 trigger guards is they are mostly different dimensions ( that info came from Saul @ DAA). At one point I had 3 different 1911's 1 Springfield loaded .45, an STI Spartan 9mm and a Nighthawk 9mm. None of them would fit in the same holster, I went through 4 different versions and ended up back with a Comptac International.
Tried the JR micro, the DAA racer, and a Schuman Hoepner variant, and the DAA racemaster. None of them held the guns as well as I liked, would they have fallen out, probably not but there was just too much wobble for me to be happy with them.