It had a tool-less door but a reversed internal layout, you open the right side panel (when looking from the front of the system)
there were tool-less releases for the HDD bays and disk drives, and it featured full-length brackets for add-in cards, with a sort of locking mechanism clamping over.
It also had this weird display on the top. you could play solitaire on it if you wanted.
bizarre little thing.

