regular TheMightyHobie18 and Magnum run a 28' stick, SX runs a 29.5'. The Magnum has the shorter wings on it and can be run without them with no penalty. The SX came with long wings and a spin kit was available from the factory, the boat is to be raced with the wings on. The SX spin is a bag launched full cut spin, mine is flat and snuffed on the pole. The SX rating doesn't seem correct but thats all there is to go with.

I'm not sure if the new sail is within 5% of the original or not. There is another boat on the left coast running the same main, "Wind Raider" is the boat. Its pic is on the Whirlwind site.