The Zaccaria versions of the Cinematronics XY games have the DAC's on the PCB's. The PCB should output a standard analogue XY signal that drives the Hantarex. I was thinking of doing an adaptor to run the Zac PCB in an Asteroids cab - it should be possible.
In theory, I could reuse one of my converted Quasar cabs to "make up" a Space Pirate/Fortress using the Hantarex. The up side is that the Hanty is original for the game, the downside I'd need to make up a power supply and wiring loom (don't know whats needed for that yet). On the other hand, the Asteroids I have isn't worth restoring and will end up parted out anyway, so I could transplant the entire internals with the G05, PSU, AR, loom etc and then only need an adaptor to run the SP/SF PCB in it (and I could still run Asteroids in it). It's also a more widely understood platform with readily available spare parts. Tough call really.
Paul.