I'm struggling to break 35kph on my speed runs and I'm pretty sure its technique related.

Ignoring equipment for the moment - I'm flying North rebels and my mate can hit 40kph on a North Neo so I'm happy I should be able to get faster with better technique.

I try to ride a fairly classic balanced stance, hips forward - plenty of front foot pressure to load the edge right along the board and avoid sinking the tail. Is there a better stance that would help me go faster?

I also tend to set the trim for my kite so I can get my sweet spot in a comfortable sheeting range (important after watching another friend continuously stall his kite - cuz it feels nice and grunty doesn't it and he likes that powerful feeling at the bar). Is there a best sheeting point for speed? I tend to ease the bar out to get it close to the edge and then gradually sheet in a bit to try and increase the power.

Cheers