My first plus was an upgrade like that. Stopped working and I gave it away because I could not find another analog board for it(for a reasonable price) at the time. than I got a broken 512k with a plus front on it ) gave that to the guy I gave the plus to, he's going to bring it back to being a 512k

of course now I have a nice regular plus that is in even better shape.

BTW, by first plus I mean that machine was the family computer in 1986, first mac I had ever used.