Well, I had started a similar thread a couple of days ago about a simple storage expansion for an A2000. Mechy has a store where he sells SCSI 7 in 1 card readers that can be used to mount CF and other cards through HDToolbox. Not to spam, but his store link is here:
http://a4000t.com/store/Might be an easier and more versatile solution considering you already have the SCSI card that is a known working quantity.