Rolf, my "loosey-goosey" settings are giving me the best results I've had with the F16 so far. These are for light air, no whitecaps. I'll see what happens at Kelly Park before I change anything else. Of course, if the wind is higher the shrouds will have to be tightened a bit.
If that works best for you, run with it! Dont listen to any mumbo-jumbo before an event at least

Afterwards when there is plenty of time, perhaps test my suggestion in a two-boat setting.
I think your observation on better windward VMG with more weight forward is very accurate and it is something I would have worked more on to replicate.