Technique: Tuning

Sailing today in super light winds (2-6 knots) it seemed like there was some power and the boat kept moving but honestly it's difficult to know exactly until tried out against other boats.

Before the Vs were at 47, I brought them down to 37 then while we were sailing down to 35 on the loos gauge. Post sail I dropped even further to 31, the NS guide for 4-8knots of wind.

Something that seemed interesting to me was that looking at the sail with the eye and then with a photo the depth seems different.

Looking at this is seems the draft was further aft than I wanted, though I did want it aft in the light winds and gentle seas.

Chick from Kea recommends running a little looser (2-3 on the gauge) than the tuning guide, given his local dominance that might be some good advice...

A reference picture from North Sail's guide for light-medium wind mainsail tuning is below. Draft is further forwards and the leech is more closed.

We'll see if the folks at sailnet can come up with some interesting comparisons.

Edit: Adding an image of mast bend with the shrouds set to 34. You can see a slight bend that seems fairly high up in the mast.