So I became inspired by RTDZIGN, and I was able to use do a Vita and Hori Mini Stick Hybrid, A Snes and Hori Mini Hbrid, and a Sega Saturn and a Madcatz Alpha Hybrid controller.
The Vita is a awesome controller for Fireball Char Types. For charge up Char after playing for a couple hour non stop, I get some hand cramps. I tried using different Grips to alleviate this, but was not successful.
The Sega Saturn Hybrid Pad is my favorite, only because I can play Charge or Fireball chars for two hours plus without experiencing hand cramps.
The SNES Hybrid is super nice too, and it's my favorite for doing "chimneys" to evade attacks, and play high level footsies.
I can't wait for the next gen of 3d printer to be developed and release so that I can start making making my own controllers.... this is one of my dreams.
I am more than happy to help anybody interested in doing one of this controller hybrids mods. I know and can provide info on how to Mod PS VITA, SNES and Sega Saturn pad. I have all 3 of this Hybrid/Franken Pad and thy work amazingly execution wise.