This, and CD32, should have had a SIMM socket to add 32bit Fastram 2mb-4mb. Both were going to effectively be stuck at 7mhz 68020 speed which was a massive mistake for the sake of adding the SIMM socket for next to nothing.
I seem to remember reading a preview of this drive in Amiga Format, and I think it was going to include either 4mb or a SIMM socket to mitigate the loss of the trapdoor slot. This could just be my memory playing up though.
I had a Zappo drive attached to my A1200's PCMCIA slot back in the day, much better idea IMHO.