I want to replace the grip safety on my Ruger SR1911 model 6720 Talo Night Watchman Lightweight Commander. I have searched and read several threads regarding replacement of the grip safety, however there seems to be differing opinions on what safety fits the factory cut the best on the SR1911 depending upon whether it is a Government model, Commander model and whether it is a steel frame, aluminum frame and whether the frame came with front strap serrations or is bald. Some posts say EGW, others Smith and Alexander, still others say Kimber. It seems that the factory cut varies from model to model, and even depending upon the year of manufacture. I do not like the scalloped tail of the factory safety and want to change it to something with a full-width beavertail. So what is the definitive answer to what aftermarket grip safety will best fit the factory cut on an SR1911 Commander, aluminum frame WITH factory serrated front strap?