I love how harry's can post directly to youtube after it overlays - it makes all that so easy... I start the process after a track day on the way home. By the time I get home the video with overlay is already uploaded!
I've also got the ipad trainer version - mainly so I can watch other guys out on the track. Harry - I hope you develop that further so it can so more data... like speeds on the straights and corners, max, average etc.
I follow his forum frequently here
http://www.gps-laptimer-forum.de/sea...ch_id=newposts