If anyone is interested, I'm offering up one of my daughter boards from my
NGC-77 stock. The card worked in a AX-100 SB Ver2.08 too.
Just as an aside, what pickups are you using on your guitars? I just picked up another Roland GR-55, because I had a ton of issues with the shitty Ghost system. I'm having a Roland GK-3KIT installed in my Strat instead.
After looking at the VG Forums, it appears I'm not alone; someone posted a video showing the amount of noise and crosstalk showing up on the 55 from the Ghost system, and it's pretty staggering. I'm looking forward to actually being able to playing the unit without a shit-ton of crosstalk and stray notes.