1. 2" is the "rule" I think just because that's how men's pants are measured around the waist. There's no 37" pant, so I go from a 36" to a 38." Not sure about what happens with your body type, but my wife hates that the extra material in the seat makes me look not quite as appealing to her1.) What practical suggestions do you have for modifying/replacing wardrobe items for IWB? Is waist+2" a good rule, should I measure, et c.
2.) Have any of you fancy lawyers/businesspeople gone out and had a carry/non-carry set of pants made for your suits? How do you keep an IWB from tearing up a Super 120? Do you just use a shoulder holster in that circumstance?
3.) What sort of belt goes well with shorts and can support a relatively heavy pistol?
2. I have had zero problems here, although I admittedly pack IWB in that kind of slacks very infrequently, as everywhere I go dressed like that is posted. However, if you carry at about 4 o'clock with a canted holster, the end of the barrel is usually sitting over the inside of a pocket, which provides protection. Just moving around causes less friction than if you're spending long distances in a car carrying IWB. That said, it took six years for my weapon to wear through my most commonly worn shorts that are 100% cotton. Wow, I'm cheap.