I know the Ed Brown beavertail is probably the best out there (if I'm wrong, please let me know), but I read this on their site which confused me "Ed Brown Memory Groove Beavertail Grip SafetyThe number one grip safety in the world! More shooters specify the Ed Brown Beavertail than all others combined. Sweeps so high on the gun it is countersunk so a Commander-styled hammer will drop into it. Our grip safety gets your hand as deep into the gun as possible." Now pardon me for being dense, but that mean it'll only take commander style hammers? I don't recall ever seeing a 1911 that said it had one and didn't use a commander hammer. I was thinking about a spur style hammer... Thanks for any info.