NoBreezeNoFun said..
When I go out its usually very choppy water and I feel that im struggling to get enough speed to edge upwind, what can I do to stay upwind in these conditions. (My board is a Airush Vox 135 x 38, 10m 2012 slingshot RPM, Im about 70kg and have been riding in 18 - 25 knots)
Board size is fine
kite size and weight, the rpm is an open c kite not the most amazing upwind ability, especially when you get pretty powered up they don't point you upwind compared to certain other models, so it'll certainly show your faults or technique, if you've a mate with a kite like a rebel etc take it for a run to see and feel the difference, if not you'll have to work on it, a wider stance on the board ( change settings)
fix a position on the beach when heading upwind, dropping your upwind hand off the bar automatically brings your body around inc hips , also I'd say you might be flying the kite too high or low in the window, too high can take your ability to edge , too low can kill the power inc your momentum, a relaxed riding style is what your looking for, get sometimes a photo shows your faults in body positions and you can use this as an aid