Nice collection there pal....those controllers are quite expensive now..., i remember when they were released with the Neo-cd...i could never get used to them!.
I look forward to seeing your controller build... i got on with those Happs....had them in a Lordsvale Woody.
Wish i still had that...
I'm in the same boat....and been waiting for my Omega to arrive, just checked & its in the UK!!...scheduled for next tuesday
Just had to dig out my old CRT Sony Trinitron...and service/repair it ...(rolling RGB lines)...was a simple fix.