I meant to say more about the PTD loops I'm using. Over the years, I've acquired a ziplock bag full of extra PTD's, some in pairs, some mismatched, many of them given to me by br'er Dale Fricke, others coming from various holsters that have come out of and gone back into the box o' holsters.
I first tried a couple of thicker, maybe older Blade-Tech loops set on the 1.25 holes. They fit on the three different 1.5 belts I use, and damn but they were secure. The next day as I was changing out of my work clothes, I noticed as I took off my polo that the cost of that security was that the material of the pants was being pulled and bunched around the belt loop so much that it was going to damage my slacks before too long. I got out the ziplock and compared matched pairs against belts until I found the ones with 1.5 holes that had the least amount of gap, the winning pair was of the newer, thinner variety.
Yet another savvy tip I picked up from PF is to iron or press the loops flat before installation for less bulk under the shirt. I haven't owned an iron in years, so my solution is to install and secure the snap set so the loops can't shift, then insert everything but the snap between to 45lb Olympic plates and stacking another 45lb'er on top and leaving them overnight. This results in some very flat PTD's with just the barest minimum of shifting able to take place.