It just astonishes me no one has cloned or offers third party upgrades
for these things. Like internal paging decode, an IF output, and maybe
even a LCD based replacement for the scope module. On second thought,
it isn't the scope module that gives trouble as much as the back three
spec an modules, which drift like a dead whale and generate a lot of
heat. If they could replace them with a three-chip modern _one_ with
some stability and get rid of the ECL-packed high loop they could cut
the thermal budget in half....to say nothing of battery life.

Also I'm not sure fixing old style power supplies is a good thing.
When they go nuts they cook every piece of TTL in the box! At least add
crowbar protection.