This is a great forum...a chance to learn something new every day. I'm looking hard at the Fastrak 21/54. I noticed that the Hustler brochure says the Hydro-Gear ZT 2800 is "commercial duty" while the Hydro-Gear website lists it as a "consumer" drive as opposed to their "proffesional" units. No doubt the Fastraks are well built but I always worry about the hydro drives. I've had three fail on some low priced tractor mowers. Would like to hear comments.