Nothing high teck Ncik Rg and Scarecrow went to a lot of trouble with their designs to keep weight down. Gato built his "heavy" with 4mm instead of 3mm ply and used wood inside his mast instead of foam. The boat came out perfect in my opinion. RG's boat will probably weigh even less, the new class rules want more weight instead of being the original design weight of under 50kg.
regards