I just purchased a Great Dane Chariot from a local dealer that has 600 hrs on it. I noticed however that when I cut sideways on a hill it cuts uneven (about an inch lower on the downhill side) On flat surfaces it cuts beautifully. Anybody know of a way to remedy this problem? The dealer also replaced the belts before he delivered it but it seems that the belts vibrate and are pretty sloppy when the mower is engaged. Can someone tell me what's normal?