thanks for the ideas.
As far as needing another mainsail hook to latch the head onto... when we briefly tried the reefable main on our old HT we used a spectra pigtail that we tied from the head of the main to the mainsail shackle that hooks onto the hook at the top of the mast. Worked well, I seem to remember. However I think it might have been difficult to get down. we never actually sailed with it. there was no easy way to bundle the bottom of the sail around the boom.
Great idea about the luff curve adjustment. wouldn't be too hard to do really and it wouldn't be too hard to match the nature (wrong word, but you know what I mean) of the curve.

When someone talks about re-cutting an old sail.. what do they mean? Is it similar to recutting the luff as suggested?

A lot of this is partially just to see if there is a way to go out when it is TOO windy to rationally sail with a standard rig.