Hey guys, who else has this problem? I just cut off the thumb break on my holster because it was difficult to unsnap in a hurry due to the beavertail grip safety on my Kimber. The Kimber is my first 1911 style pistol and I'd never had problems with thumb break designs until now. My pistol is carried concealed and speed is of the essence in my opinion. So, my new holster is an open top now!