I'm running a 6620 level land with 4500 hours on it. There is an auction coming up with a sidehill machine that has 4000 hours on it. I could use mine for parts. I was just wondering realistically how many hours you can put on a 20 series combine. How many hours have some of you got on yours? I've seen some with less hours with extreme metal fatigue. I don't mind replacing bearings and augers or any other part that can be unbolted, but I hate welding frame work and sheet metal.