I've never seen a Medeco (or Abloy, or any other
really hard-to-pick lock
on a machine frontpanel).
I've got one. But I don't see any reason to reinstall it on a machine.
I guess Ace locks are used because they're fairly
short from front to
back (unlike 'yale' type cylinder locks) and will fit easily into most
frontpanel systems.
Aha! You've just provided the answer! Chosen for physical dimensions,
NOT for its difficulty of picking.
In the UK, most steering locks are held on by
'sheer head bolts' that
have to be drilled out.
"Tangential tapping" with a tiny chisel usually
works just fine to back
them out.
[I used to own a Honda garage. The local dealers would tow repos, etc. in
to us for patching back together.]
The point is, it's not worth . . .,
so the lock that's fitted provides adequate
security.