Just picked up our first commercial mower yesterday. Mower is in good shape and should be a lot of fun to play around with. This is definitely a much more serious mower than what we are use to. My question for you guys out there is, what sort of advice can you give us for the future as far as, maintenance of a walkbehind or maintenance of the exmark series, tricks for obtaining the best possible mow with a walkbehind and other general tips we should be aware of. Thanks guys.