Sorry to hear about our friends here who have some real problems.
I guess I'm doing pretty well, but then wiring work is only a part-time occupation for me, so I'm not at it 5/6/7 days a week.
That said, I have to admit that at 37 I find crawling into tight corners, across joists etc. more strenuous than I did say 10 years ago.
The glass fiber point is one I've come to ponder upon more in recent years. That stuff is horrible in a confined space, and it makes me wonder why we still use it in its present form in attics. The insulation pre-sealed in plastic which you can just lay between the joists or staple onto wall studs is looking better all the time.
