This is a Standard 4GF made out of canvas. Since the modified three pontoon concept worked so well with nylon fabric, it was worth a try. I even threw in some brass grommets and perimeter rope!
Not only did this mat ride nowhere near as well as a nylon 4GF, it wasn't as good as a Converse Hodgman in head-to-head comparisons. Which reinforced what we were beginning to suspect at the time...that each material calls for a different configuration of dimensions, pontoons, and I-Beams to maximize it's potential.