It was Steven J Tucker who designed the 256K (later upgraded to 512K) Astrocade bank-switch flashcart The board was just a plain PCB and was never sold. When Michael (who was working with Steven) sent me one of these for testing, I provided my own cartridge shell and hacked-it-up (quite literally using a hack saw!) so that the PCB would fit in it. One side of the PCB plugged into the Astrocade and the other side plugged into the Atari Max Flash cartridge programmer. This cartridge worked great, but it never went into production, nor was it ever available for sale. Here are some pictures of that board:
The Atari versions of this flashcart are still available for sale here:
I look forward to trying out this new Astrocade flashcart; it looks very useful. If I had one, then it would allow me to test hacks of Astrocade games so much easier on real hardware. Gone will be the days of EPROM burning!
my own personal opinion: I would have tried a 90 degree connector on the Bally end so that the plug could have come out of the top, kinda like the UltiMulti switch. mIt doesn't have to be an edge connector, it could be pins.