So I have been using the Concealment Express IWB holster for the P226 for a few days, and the top corner was really bothering me. I'm not particularly fat, but fat enough for that part to be poking at me, especially while sitting down. So I decided to get out the Dremel and fix it. I cut off the circled area, sanded it, then buffed it smooth and I must say it is very comfortable now. No poking at all.
CE may want to consider modifying the holster, but if not it works for me now.
Here is the after pic
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