Ok, 30 hours of fun on my mini ended today when I threw a track. They (the local JD dealer) said that the reason it threw was because it came straight to the jobsite without getting checked at the shop for proper track adjustment. Took quite a while to get back on...no fun at all! Now everytime I hear a creak or a pop, I think a track is getting ready to go again! That said, it is VERY easy to keep the track tight so I am sure it wont happen again...I hope! For the record, though, the JD 35D is on SWEET machine!