Sorry I missed that post.
You should be cut out for it then, long as you are strong enough to bench press a boiler up through a loft hatch, nimble enough to catwalk from roof ridge to chimney top, small enough to slither round like a snake between dusty muddy subfloor and downstairs joists, roll in rockwool at the eves of lofts, traverse across roof struts, spend half a day in a cupoboard bent over in one position piping up a boiler with 6" of room below boiler for all pipes, and can **** through the eye of a needle which is what it takes to understand regulations these days.
Apart from the bog standard plumbing stuff, like having stronger grip than the average jo who can't get things undone or done up that we have to, someone has to. Can one armed get the back nut off the far bath tap, undo pump nuts at the back corner of airing cupboard whilst burning arms on hot pipes. Oh burns, at least two a day. If you smoke fags tasting of laco, wife complains you smell when you get home at night.