550s are not expensive to modify... 1/3 or not less the cost of a superjet.. a half pipe can be had for under 200 dollars. bored exit nozzle, stainless impeller, intake grate. bars, quicksteer all can be had for less than the cost of a factory b pipe for a superjet.. 550s respond just as well to mods as any other ski... as long as the engine is in good, healthy working condition..