I got my Coronado Personal Solar Telescope (PST) from my friend, it's in pretty good shape except the famous PST rust. See below:-
Double stacked with my Solarmax40, some people call this PSM:-
Let's see how it performs, the short extension tube between the black block and the visual back is removed to focus with a DMK, the visual back also host the blocking filter which is 5mm in size.
Since the rust issue is so series, most probably I won't need to keep the further modifications reversible at all.