Whiplash Sport20 Kit is cut from a CNC Laser with exact precision. All skin is 1/16'' 3-ply birch aircraft grade plywood, the frames are 1/8'' 3 ply birch plywood. You can buy the kit without a cowl, or with a vacuum bagged fiberglass cowl. A 10 page insruction manual as well as a CAD layout are also included . Specs: Hull Length: 30'' Hull Width: 15-3/8'' Sponson to Sponson: 9-1/4'' Stance: 11-5/16'' RTR weight: 5 lbs Accomplishments: 2006: Won 3 out of the 4 events entered 2006: One way pass over 100mph with Electric Power. Recommended Hardware: Speedmaster .21 Mini, 105m Speedmaster .21 Flat Bottom Strut, VM-1F Speedmaster MM Ultra Light Mount