The following is a copy of the original instructions that Len Gabriels sent out to all purchasers of his self designed Mk4 Hang Glider in late 1973. The Mk4 Glider was the same as the Mk3, but included a king post and top rigging and used proper sailcloth instead of ripstop nylon. It was sold as a complete kit with everything ready made, it only needed to be assembled.