I was wondering if anyone out there has had any experience with the eXmark FrontRunner. I'm curious to know if it's components are designed to withstand the rigor of day to day commecial use. For instance, I noticed that the drive motors are Hydro-Gear Planetary Reduction motors (the same as on the Navigator) as opposed to the Parker/Ross wheel motors used on the Z's. I haven't had the chance to see one in person, but during one part of eXmark's demo dvd they show the underneath of the mower and the drive motors appear to be aluminum alloy as opposed to the sandwiched steel components of the Z's drive motors. One would think that since you're pushing 5 or 6 wheels (6 on the larger models) through turf and not just 4 as with the Z's, you'd need an even more durable drive system. Any expertise on the subject would be greatly appreciated.