I knew the 1GB 80x Transcend Compact Flash cards that I bought would work. I was able to get them to work on all our machines 0i-mate-MD, MC, 0i-MD, MC, 21i-MB, 18i-MB and 31i-MA. I ended up formatting them in our old Nikon E990 camera. They all worked after doing that, from dataserver to DNC to punching out parameters. This wasn't the solve I was looking for but it works for now.