So happens my XT is a Leading Edge model D. It's a good solid and slow system but it works so well and is small. I got mine from the first owner who bought it new when it first came out. Prints for it would be nice. Hacks (plugins) applied to it over the years: Used the basics disk controller that is on the mother board to run a 720k 3.5" and 360k floppies. Installed a 1.44/2.88 floppy adaptor so I can run 1.44 floppies. Installed 1002 HDC and st251 V20 (to run 8080 software) My Inboard386pc was in that one for a while. The machine is useful for many things as its so basic and clean clone. Allison