Thank you Tom. I'll give it a try.

I have one additional question about the HD on my SE...

The 1987 SE 800k has an internal 120MB HD with SCSI set to ID=0. I have an external 120MB HD connected through the SCSI port, also has a SCSI ID=0. I don't know how to change the ID for the external as the switch has different wires than the pins require.

When I boot up the SE with the external connected, the internal HD doesn't show up on the desktop.

I know I can't have two HD's with the same ID on the same bus, so should I simply set the external to "slave"?