Hehe. When I brought my Vax 6210 into the basement, I
disassembled it.
Of course, that massive cabinet doesn't come apart, but the doors and
top come off, the blowers and power supplies can be removed, and it can
be made somewhat lighter and more manuve rable.
I always dismantly large machines before trying to move them, both for my
protection and (more importantly) their's.. As you said, PSUs often come
out quite easily, and are significantly heavy, particularly linear ones.
It's suprising how heavy the PCBs in a full cardcage are. On their own,
each board is light, but when you have 30 or so, it adds up. I often pull
all the boards.
-tony