So I got a nice bit of info on this modded Mac. I went to the Apple Museum in Orvelte today (and bought off 6 mostly broken Macintoshes from them), and during the tour, the owner, Klaas, showed me the Plus with HDD. We talked about the reactions on it on the forums since the one on Marktplaats recently surfaced, and then he told me he was actually the one who modded them, which made me realize the one in the museum was not the same one on Marktplaats. Apparently, he found the HDD upgrade for the Macintosh Plus too expensive, and did that mod on his own Plus. Then he proceeded to offer it to schools, for a lower price than what buying up those external upgrades would have been, and did classrooms worth of Pluses on upgrades. Also, despite it being marked Psychology Lab of University of Amsterdam, the Plus was already at another school, bought secondhand by them, by the time he modded that one. That was really interesting to know. And he was right when he said that back then, the Macintosh was purely a working machine, not the collectible it is now, so we should put it in context why it was done. Also, he joked Apple took his idea of putting a HDD and fan inside of a Mac with the SE :lol: