Yeah, that does look pretty badass.
But if it worked on Jay's, why would you need one without the ULE milling inside? His was a standard Alpha. The holes he drilled through the sidewall like that serve to align things, you don't need a full length groove.
Am I missing something here? Did he have to make an insert or something to fill in the ULE pockets? Got any pictars of the insides of that rail?
If I can do them without a lot of fuss, I'd be more than happy to cut some for you. I just don't want to have to totally rethink my process to make it work.