but if the system works, make a video of it booting up, and possibly running something *before* you start taking it apart and de-soldering bits.. just in case ;-)
Obviously not *required* but it's general good advice, as people have been known to break things, leaving us with no idea how it's actually meant to look.
(This obviously changes for stuff like NOS of HDD based systems where ideally you'd want the drives dumped in a completly untouched never booted state, keep floppies write protected and such too)