>and mounted
> to that will be an epoxy sealed module.

Now im following all this resonabley closely, as i may go for a module or
two, but im concerned about the epoxy stuff.

Stuff breaks now and again. Normally its just a case of finding out what
exactly has gone, and, providing there are not design flaws making the
component break, just replacing it.

I dont think theres a way to ensure stuff never breaks. But encasing it
ensures its at best very dificult to fix.

How much is to be encased The temperature sensitive parts in small groups,
or the whole lot in one go

Cheers, Julian