I've got over 1500hrs on my '97 with no wear problems as of yet. After corn this year I replaced chopper blades and knives along with the belts that pull the roller and chopper. The one thing on this machine that has given me more trouble than anything is on the rod that engages the throat and header. There is a bolt that slides over the rod and bolts through the idler pulleys arm that tightens the belt. I have had one of the bolts break, so I welded another bolt onto it and ordered a spare. Put that one last year and just a couple of days ago it came loose so I put a lock nut on it this time. Nothing to it really. Hey, if you guys find some low houred, well maintained '99's for sale pass it along if you can JD