Just get a Super CD-Rom 2 unit for your Supergrafx. There seems to be a issue with using a briefcase unit and a RAU-30 with the SGFX. I def see a problem with Art of Fighting,it freezes up in the loading spots.
AoF seems particularly finicky. The freezing (most of the times a temporary halt, but a full-on stall once in a while) also happened with my former SGX + SCD-ROM2 setup, as well as my Duo setups. Others in this forum also have had similar problems with AoF.
Yea it is gonna be a few as I will have to buy an Arcade card etc. BTW what all do I need? The docking station I know and a System card, that is it right?? And if I get the Arcade Card I don't need any other card correct?
If you have the SCD-ROM2 system, the Arcade Card Duo (or the more expensive Pro, if you choose to do so), will allow you to play everything in the PCE realm, minus the US HuCard games.
If you have go the RAU-30 + the CD-ROM2 Briefcase unit, you'll HAVE to have the Arcade Card Pro. I wouldn't recommend this route anyway if you already have a Duo.
You can see pictures of these setups on this thread:
https://www.pcenginefx.com/forums/index.php?topic=2714