Thanks Horst and Gunnar.
Today it was extremely windy, out with a 4 m2 and sometimes more than 20 knots.
But also some long lulls, so I tried your advice, stepped my rear foot a bit forward and held the wing really far back.
Now I could go halfwind no issues, great
I also discovered why you (me) often still end downwind in the lulls:
When the wind backs a tad off, but you THINK you can pump into foiling, you bear off half downwind angle, to catch the waves and pump into foil.
I do this for a long time, hoping I will succeed, by getting a puff, as once up you can go quite some upwind.
But when I don't succeed, in particular on my non natural side that simply needs a tad more wind, I go sooooo long downwind while trying to get foiling
I know for sure, this will only be a matter of time and experience, till you know exactly HOW much wind you need, to be able to foil, so you can go at least halfwind in the lulls, and ONLY waste a bit of height when sufficient wind, to get foiling - it will come one day.
Thanks for the tip guýs, it works.
I don't think longer boards goes better upwind really, BUT, because of their length thus often longer behind the mast also, you can stand further rear when on the surface, so you don't have to stand a bit odd with wing to the rear of you, like needed on short wingfoils.
Meaning it is a lot easier and more natural on the long ones, when on the surface
Peter