Cheers for your comments, i think part of the problem may have been me just holding the kite at the zenith, too busy concentrating on getting my balance on the board and trying not to fall off!!
I'll have a go at trimming the brakes a bit to see if it generates a little more power, which is always good with a blade!
Sorry if this sounds stupid, but i just dont want to be doing anything wrong...... is the webbing strap that is attached to the chicken loop, i assume is to attach to the spreader bar so that is doesnt fall off, but on my Prolimit harness, there doesnt seem to be much room to attach it, does this seem right?