I could make my own carts but I don’t. I am considering making a prototype cart for the cx4 that supports hirom, sram, and 32mb rom size. The cx4 does support these three features but no game used them. Only a prototype cx4 board had foot prints for sram but no pcb used it from what I could find. One reason why I converted gradius 3 to hirom was to see how hard it would be so I could possibly convert mmx1-3 to hirom. Probably be some time before I decide to do this but I think I will. I really want to use a same game cart for this so I can use it like a pass through cart for individual games. I think I can pull it off and it would be really cool if I did. I would even consider converting mmx1 to use cx4 if I pull this off.
Yes, I like to show screenshots but most of the time I’m posting from my phone so it’s harder for me to do screenshots unless I’m on my pc.