I've not flown that big of sled but have built and flown some smaller ones of similar design. The Peter Lynn pilots are very stable, and can lift a
lot. Another big advantage - they have no spars or other breakable parts and can fold up into a very small package. Peter Lynn is probably the
worlds best designer of lifting kites and goes to kite festivals all over the world.
You might get more useful feedback at kitebuilder.com. I'm pretty sure there are people there who have made and flown both. They have thread 10
pages long on the Peter Lynn pilot. I'm pretty sure they have some on big sled's as well. That site is more oriented to such kites and though mainly
about building they have done a lot of flying of all kinds of kites.
http://www.kitebuilder.com/forums/viewtopic.php?t=10470&...
NPW Test Pilot -US99