My 2 pennorth,
The business of listing "4 systems you have had experience of" is a
little odd & seems to hint at an administration that don't know one end
of an electrolytic from the other, it's rather like choosing a builder
based upon "what type of housing stock he's worked on". ("Door
sticking?, No mate, I only do victorian terraces & 1930s semis")
Personally I was musing with the idea of volunteering when the kids are
both in school, as I'm 44 and have been doing electronics for about 42
years, and I'm not a million miles away, but it's going to kill me
seeing stuff rot, and not being able to get my hands dirty for the sake
of a piece of paper.