latest version of the firmware fixes the issue with Sengoku Basara X, also getting past the hardware checks on RRV allowed me to confirm that it's working as well.--Tested and Working
Sengoku Basara X Cross
Ridge Racer V Arcade Battle
--Unable to test (requires Driving 246 PCB)
Wangan Midnight (wont boot/black screen)
Wangan Midnight R (boots but freezes after intro video)
--Not working
Netchuu Pro Yakyuu 2002
I still can't test Wangan as it seems incompatible with my System 246B
so at this point the only disc game that isn't working is: Netchuu Pro Yakyuu 2002