Help me make my dream stick.

First let me say I've been out of the game for quite a while. I think I will just mod a Hori real arcade pro 3 I have unless you guys really think I should use something else. This is what I would like

1. Ability to work on as many systems as reasonable especially PS4,PC, and SNES
2. RGB control for 8 buttons
3. RGB control for joystick if possible
4. Optical sensor for joystick

What parts should I order and from where?
What additional buttons if any should I have?

I'm pretty decent at soldering so I'm not really worried about wiring. Any tips/suggestions are appreciated.

Thanks!