James,
Joe has one. It flew pretty good. It weight 50 oz. it was powered by a scorpion 3020 with a icelite 50 with a hubin timer on 4s 2700mah batteries. It was built just as the plans show. The only thing I would be worry about the stab being to flexible. We put carbon rods in to stiffen after it was built. We still have it in the basement, had to be repaired after a figure 9! He just needs to recover it.
Joe