sweet guys, thanks for the comments and questions.
Those sleds are homemade and not perfect for what we had to do on that trip. I'm developing a new design for a sled that offers a roll-up design for stowage and transport more easily in remote areas. What we learned with those sleds is that the sidewalls need to be higher and the sled slightly longer to disperse the load and provide a lower height for stability in center of gravity performance. The ones we used kept flipping over and the sides of our load kept getting snagged on veg and shit, which slowed our pace coming off that mile-long ridgetop.
This new sled is working out great so far, and it is simple and rolls into a pkg that is 36" wide by 6" around.
I've got some tweaking to do for this design, but hope to have a production-ready model sometime this year to be available perhaps as early as spring 2015. I'll keep everyone posted on the progress.
larry