I also have a Franklin Ace 1200. I bought it new. Add a eprom burner to slot. Also changed the F8 rom to make it ProDOS compatible.
I am not sure if a still have the speed demon card.
I have a radius cable 590-00029. On this web page it will work with both the color and b & w pivot.
http://archive.retro.co.za/mirrors/68000/www.vintagemacworld.com/radiusmain.html
Unless you have an early b&w
It works with all RasterOps Boards and Apple 8.24 board. I have the power supply. There is no software needed to run it.
I have been going through my collection, and thought it was interesting.