I am thinking about buying a 2005 225 E-TECH with a warranty til 2011. The owner has the motor in the shop because a ring slipped, and they are going to re-sleeve the cylinder, and put a new piston in it. My question is; If it is under warranty, wouldn't they put in a new powerhead ? A mech. friend of mine told me the e-tech takes a special piston, and they need special equipment to do this work. Is this true ? Should I be wary ?