HOW HARD IS IT TO CHANGE MY Impeller AND SHOULD I ? DO I NEED TO CHANGE PITCH AND WOULD IT MAKE THAT MUCH DIFF. WHAT KIND OF JOB TIME? IS THE WAER RING HARD TO PUT IN I DONT KNOW IF ITS EVER BEEN CHANGED. ANY SPECIAL TOOLS THAT I NEED WOULD A TED NUGENT CD HELP OR ROMONES:bigear: