I've been reading these forums for awhile, and have seen many threads about the 50 hour service for various JD machines- folks buying all kinds of filters, oil, grease etc and some dealers charging up to $500 for the parts/labor. Well, I'm nearing that time so went to look at my manual to get a list of all the stuff I'll need for my 3320- all it reccomends (other then checking some stuff and some grease to the fittings) is to change the engine oil and filter! They don't specify changing the transmission and fuel filter until 400 hours, the front axle at 600 hours and the hydraulic filter at 1200 hours. What do folks think about this- should I go ahead and change the other fluids at least yearly (or by hours depending on which comes first), every two years? Are these machines so different from previous machines or was the maintenance on the other machines overkill?