Stick project: MC Cthulhu + KADE

I just won a bid on a Dreamgear Arcade Fighter. My intentions with it are ONLY to gut and mod it to run on multiple consoles, the original idea was the MC Cthulhu (and I'm pretty dead set on that). But after doing mad research, I realized I had an issue. On the face of the stick, there is are L3 and R3 button next to the Start, select, and home buttons, which the Cthulhu doesn't accommodate. I'm too OCD to leave them function-less, or let there be two gaping holes in the stick. While trying to find a way to make them work, I came across the KADE PCB. It's perfect for making the whole stick functional after I gut the original PCB and buttons/stick, but, it's not the MC Cthulhu so I lose multi-console function. I know that you can add an Imp PCB to add an additional controller PCB with it, and I'm wondering if it's possible to run the sticks extra buttons to the Kade, and run that to the Cthulhu, so I can have my L&R 3 buttons, and maybe (but it's not important) have the ability to add a Xbone PCB as well, since it's the only current Gen I want to add to this project. Could anyone help a newbie out? I've found a lot of articles on here that have helped getting a game plan to working with this particular stick (I'll link them), but I can't sift through all these old articles, especially when I don't want to bump one that's been dormant for the last 5 years. I would really appreciate the help

http://forums.shoryuken.com/discussion/81556/modding-an-ikan-naki-arcade-stick-is-this-everything-i-need

http://forums.shoryuken.com/discussion/71741/partial-review-arcade-stick-iv

http://forums.shoryuken.com/discussion/172534/kade-new-multi-device-encoder-project-low-cost-coming-soon