Keg - and maybe others, just a question from right/left field (whatever your politics may prefer):
how do you reckon the "system" would react to someone looking to "reverse" their career - for example someone over 50, done the command thing for 20+ years and wondering what it would be like as a librarian for (if lucky) a couple of years then maybe as F/O flying into the twilight of their career??
Cheers.