Has any one done any performance Mods to the 110hp Rotax engines. There is a company named Rossier Engineering that does mods for the Sea Doo Jet Ski's (increasing the head compression, jetting, etc.). They claim they can get 135hp out of the 800. I am extremely interested in gaining speed and torque in my 99 Speedster, but I would really like to hear from someone that has done some of the mods.