Crap'n Neal® scribbled thusly:
I don't do any of that sort of tedious book keeping.

Of course not, you can't even count to twelve.

... It's a simple
matter to look at how the sails set and note the condition of the
stitching when underway and when the sail is bent on, raised or
lowered.

Sure, when your sails are the size of a beach towel.

... The best time to not the shape of a sail is after a good
rain when sailing for a day or so. When the sail dries, all the wrinkles
smooth out and the sail looks primo.


???
Does rain have any effect on sails?

How about salt water spray? But you don't have to worry about that

OzOne wrote:
True, I look the sail over every time it's hoisted, and have a quick
glance over before it's doused and note any problems.

I find the "book keeping" is quick and easy, and actually saves time
dragging out a sail that you may not have used for a while to check
its condition.


Considering that un-bagging and un-rolling etc etc then re-folding &
rolling & bagging the sail also takes it's toll, I think that sounds
like a great idea. We used to have a spreadsheet with our sail inventory
and data on the sail such as wind range, apparent angle, mast tuning,
etc etc. It was fun.

Fresh Breezes- Doug King