Just who is giving you this story about no warranty as to where you put your weights? It sure seems to me you are putting more weight on the drive train by putting weight on the chassis then the wheels. If it was me I think I would want to know if your information is right on this warranty. One of my mowers is a hydrostat and I have had wheel weights on it since the day I bought it and the wheel weights from the dealer and it is over 20 years old and never had any drive train problems.