John, while your attention is here..

What is your rationale for not leading mast-rotation out to the hull on the F-16 Stealth? I had the impression that having it at the hull was more or less mandatory to be "competitive" today.
I see this as a small advantage on the beat to A mark, and on the jib-reach from A to B, but no big deal.

Mike, I have personally experienced how important it is to flatten your mainsail when the wind is weak. As John say, you get a bit less power (or perhaps not, if the flow over your sail separates to early), but the decrease in drag more than justifies it.
We was passed by another boat in weak winds once, but after hauling on some more downhaul we was able to catch up and finish well ahead. The difference in speed between just straightening out the wrinkles and taking the downhaul to the no.5 setting was very large (relatively speaking).