After being taken for over $300 for my 1st/last dealer servicing I'm going to do the next one myself and would like to avoid the cost of Kubota-brand products if possible. I own a B7500 HSD and am interesyed in any non-Kubota oil filters, HST filters, fuel filters, and recommended transmission and front axle case fluids/oils. I'm in east central IL where ambient temps run from 0 - 100 F (though I have yet to use the tractor in the winter). Also, any chance of there being non-Kubota air filter elements (both primary and secondary) that would work? Thanks, Mike