I've been out with my iS131 + TR-6 9.2m2 about five times now.
I can't believe how early this combo planes.
My board is not really flying, only in stronger wind.
I know that raising my boom and moving the track back might help as i have not had any problems with control.
I'm hesitant to go in this direction as my stance is not that good to begin with.
My front foot is very light, only when going deep downwind my stance feels good.
I usually have my harness lines positioned so that i can let go with my back hand.
Maybe more downhaul would do the trick for me.
I have my foot straps in the back position. I'm 175cm tall, my boom is about chin high, mast track in the recomended position. I use adjustable harness lines, i have them usually in 28" but might lenghten them if going deep downwind. I use waist harness. In light wind i use Select S10 53cm and in stronger 49cm.
well have to do some testing....