I have recently acquired a 2002 Gravely 48 - LOVE IT! The twin-15 Kawi starts beautifully, the cut is perfect! I am having a slight issue with tracking; my machine tends to track either left or right (even on pavement tests without any bumping from uneven ground etc.). The operation manual and my dealer states tracking issues are handled by changing air pressure in the tires based on the direction (increasing or decreasing respective to direction). I have played around with altering pressures per the manual, however this does not appear to be solving the problem. Looking for some advice - FYI - brake and clutch adjustments appear to be within specs. Can't keep it straight in CT!