John, with all the time and effort you've put into this project, have you contacted any of the parties involved? You can't be the only one experiencing these problems, I wonder if a bug in the right ear would get something done about it? It might be hard to get a hold of an engineer at Ruger, but it would sure be interesting to hear why they built it the way they did.
My Witness 45 uses double-stack mags and holds ten rounds plus one in the pipe, but it's a big sucker, noticeably larger than a 1911, and probably about the same amount bigger than the P97. I wish someone offered metal followers for those mags, I have six, and only four of them will hold the slide open when they're empty!