Raidion LTX SCSI to SCSI raid system

Morning All, I've pulled an old Raidion LTX SCSI RAID out of the closet in hopes of using it to backup a small server (SS20) and need some help getting it running again. For example, is replacing the drives a simple swap? The existing ones are Micropolis 3243's but 2 of the four are dead and I'd like to replace them with 4 Seagate 9.1GB narrow drives that are handy. The company appears moribund (www.raidionsystems.com). The online links to manuals are dead and email to the tech support address is returned as undeliverable. Phone calls to Tech Support get voicemail but no return call. Web searching leads to old product reviews, the company homepage, and not much else that's useful. Appreciate any leads to manuals or other documentation. TIA for your help, Doug