I found a interesting sled kite derivation in a .PDF freely available on the Drachen Foundation website. It has a claimed wind range of 3-30mph! Tests so far have been intriguing though in my case I have, at times, encountered a wobbling oscillation that ends in the kite turning and accelerating into the ground. This did not happen the first 8 flights and only occurred every other flight after that so it may be something to do with certain wind conditions creating more turbulence where I fly. Others who have built the kite have not encountered this and despite my issues I do see promise. The pull is quite amazing for it's size and you could loft mobius cameras with ease. It could almost qualify as an indoor kite (when straw spars are used) and high altitudes are possible with minimal wind. It can structurally hold up to very high winds though I recommend using hardwood dowels instead of straws for spars.
Weather_Book_7-11-11.pdf Book in .PDF form here
I should note in my tests so far the spars on the keels have proven to be optional
http://www.drachen.org/sites/default/files/pdf/Weather%20Book%207-11-11.pdf book available here. The other kites are interesting as well.