I would love a vertical or hybrid frame. I HATE .45 frames. Serisouly. I have a 90* on my 'Cocker currently, and I have a UMF for my 'Mag (being EP'd right now) and a USF for an old Shocker I sold. I have a .45 on a Nelson-based pump right now and hate it. When I get some cash, I might have a vertical bolt-on machined up.
Also, I like the LPR outside of the body, but you already said that would be an option, so... awesome.
Autocockers are the greatest markers ever made.
~The greatest BACKUP markers to AUTOMAGS!!
Only temporary, get'n a new sig soon.