I'm am happy to receive my new SD54. Can go up my hills now. I could only go down when using my neighbor's Toro residential ZTR. The Hustler has far more power, traction, and the controls are oh so smooth. I contemplated forever over the 48" deck. I don't know why I waited so long. With the trim edge on the 54", I can now see why the 54" is more desireable. Anyway I happy except for one thing. A SQEAKY seat. I can't tell if it is the hinge or the spring/s/. I need some advise here. Both the service and parts manuals don't indicate that I should grease/oil the hinge. Should I?