Well, here's the finished product. It was kinda fun researching and making my own. If anybody wants a custom fit holster just contact Nate Gable at UBG holsters. This one was fun but it wasn't fun enough for me to want to do more of them
Nate must be really fast at this stuff or he's not making any money to speak of because if I were to charge a reasonable shop rate for this thing it would cost $300 ![Stick out tongue [:P]](/emoticons/emotion-4.gif)
I ended up taking quite a bit of leather off below the clips and I took a lot of Kydex off the tabs that were riveted to the leather; that fixed most of the comfort issues. I also extended the sweat shield to cover a little more.
It's still nowhere near as comfortable as the UBG Regulator OWB that I normally use (I like it so much for my BT380 that I ordered one for my CW40) so the Regulators will be my normal carry option. Since I normally wear untucked shirts it's not a problem but I wanted to make a tuckable IWB for those rare occasions when I need to tuck in a shirt.
Thanks for all your encouragement.
Bronson (pics are below)
Here it is with the gun:

Here's the top to show the front sight channel (another PITA, along with the clips):

And here it is without the gun:
"Each new generation born is in effect an invasion of civilization by little barbarians, who must be civilized before it is too late." T. Sowell
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Thunder .380
Browning HiPower
Kahr CW40
Kel-Tec P32
Ruger MK I
Ruger GP100
S&W 60