Hmm, Well from a preservation point of view, this makes a very interesting machine as it stands - probably fairly unique. Maybe the thing to do would be to collect together a bunch of 64Kx1 chips and keep them safe somewhere so that the machine could easily be restored to original condition (or as close as possible) at some point in the future, if that were necessary. Surely there's still quite a few Mac 128K's around, so they're not an endangered species yet... Just my 2p's worth (or $0.02, depending on which you prefer...) cheers Jules