Wow Jan, 16-17 knots (pretty 5 BFt) and a 9,5 m2. Impressive.
Either you have a lot of technique or you have mighty big biceps.
I've been sailing a 8,4MKII last weekend in slightly overpowered conditions (gusts to 16-17 knots). I could handle it because of side off-shore wind with super flat water. I wonder what a RSR 8,4 would feel like in the same conditions.