The "wedge" bolt on piece has been done before. Cane & Derby had/has it on their AIWB offering. Which incidentally was my first holster when I was converted to carry appendix by VCDGrips back in 2011.
My experience with that holster was that after a few hours of carry, that very wedge would cause a not insignificant amount of discomfort. After about 6 months of trying to 'adapt and overcome', I moved on to the Shaggy. Haven't looked back since.
I will be interested to see if Raven's wedge set up will have better results. I won't be jumping the Shaggy ship for this, for now.