Simon, I can see some sense in what you're saying; the faster you go the lower you can sail due to the apparent wind. However, if you're not on a pure run due to course or wind shift would you sit in to reach a high mark and not trap due to the above? I seem to be doing the opposite, trap to sail high and sit in to sail low. I wish I could race against other f16's as often as they do at Datchet, this is the only way to get the best answers.