Dave, thanks for sending me the link to your Edge plan. I had already scaled Tim H's Outrageous Foamy Edge 540 to 36' span and I built it today using 3/8" polystyrene foam edged with 1/16 balsa for both the wing and fuse.

It was much lighter than the sturdy board and the bare airframe weighed just over 3 oz. It launched vertically just like George's Tribute but the wing flexed alarmingly during manouvers. I need to stiffen the structure but haven't been able to find any carbon fibre tube in my locality.

Bob