Does it really pay off with respect to VMG for one-up to get out on trapeze downwind? How about two-up?
Without a doubt it pays single handed - It even pays on the Inter 17 and it carries more KG around !
You get the aparent wind forward, then go faster, then sheet in some more, then bear off and then go faster !
In an F4 on the 17, I could go LOWER and FASTER wiring than someone who was not.