I bought myself a GPS watch that I can take on our down-winders and after blue tooth the info to my computer so I can see on Google earth where I went.. How far.. How fast.. etc.
Got my Dick Tracy watch the other day...It's as ugly as hell but it should give some good down-winding info..and also good for testing different board speeds.
I've just got to work out how to use it... Jeeeez it's complicated..