A sampling of Middendorf Climbing Gear Designs:
A5 Haulbags were the most innovative of the time, and all current haulbags "borrow" ideas from A5, including the "tuckaway" shoulder straps (an A5 first), the waterproof closure, the offset clip-in, and many other innovations.
A5 design was an alternating process of field testing and building prototypes in the shop. Above are Middendorf's notes written on a back page of a book he was reading during an ascent of El Capitan with new ideas. But A5 was a team effort--below, the 1995 team and the orignal A5 "credos".
A5 Portaledge Development. A5 Portaledges enabled a huge boom in big wall standards in the 1990's because for the first time, climbers were able to withstand Himalayan type storms. More soon, including information on John's new D4 Portaledge Design (http://facebook.com/bigwallgear)