F16's can be very fast in the light winds as well. I'm too lazy to adjust mij diamonds often and just sail with a good average setting through pretty much the whole season. Light performasnce is however mostly about sail trim and feel and can be rather technical. With big wind it is much easier to find the optimal setting as the response is immediate; in light winds you don't have such a pronounced feedback. Very small adjustments in for example downhaul tension can have large results but you have to wait a 30 seconds before you known it.

It is very easy to kill a modern superwing rig by making the wrong the adjustments. Quite often the right adjustment may eb counterintuitive. Again the example of the downhaul is illustrative. I'm running quite a lot of it in ligh air, more then in medium air and only slightly less then big wind. My mainsail responds well to that but each mainsail may be different in this sense.

Light performance is alot of trial and error and remembering what works for your particular cut of mainsail. Boat by boat testing is very helpful here even when the other boat is a F18 ot N20. You should be able to keep up with both in 5 knots or less wind.

The F18's are hardest to match at about 8-10 knots; not at 5 knots or less or 12 and beyond.

For now I must leave it at that. (I have a full schedule these weeks)

Wouter