So here is just another mod. It's a turbografx-16 modded with internal ED 2.4 and super system card functionality for the cd games. It will default boot to ED without hucard in slot. Shout out to thesteve for figuring this out.
Having a spare hucard slot helps with the mod but wires can be run and soldering directly to the ED.
Note: LS245 is needed at empty spot (IC103) on tg16 pcb for older version of ED, ED 2.4 has it already built-in.