Nice article . I disagree with his thoughts about cutting the sweat guard off . I have used several with a sweat guard and never had a bit of trouble. As he said some might and if they do then I can see cutting it off.
One thing I can relate as to my own experience concerning holsters is to never use a thumb break strap holster for a 1911. I have used two , a DeSantis belt holster ( the worst ) and a horizontal shoulder holster made by Galco , and both , if you moved just right , would kick the safety off. Carrying cocked and locked , I didn't like that happening.
If you have a holster of this style , you can test it by putting your pistol , unloaded of course , in the holster , snap the strap and then push the reinforced portion backwards toward the bottom of the grip with your thumb. It will disengage the safety. It doesn't take much pressure either.