Took mine in at 5,000 miles since the belt was drifting a bit off and rubbing against the frame. Did not do any serious damage to the belt but it had to be trued up and the tension adjusted. While at it the dealer changed out the oil in the bevel box and put in an 80/140 synthetic gear oil. The stock oil, according to the manual, is just that but my dealer had his doubts. It appears to be a bit quieter to my ears. I still have a high-pitched whine but much of the other noises are reduced. The bevel box has a magnetic drain plug and did catch some debris but not terribly much.
Other thing to note is the wear on the rear spline is much more advanced than the front one as the rear is made of aluminum and the front, steel. The drive belt is catching all the flying debris and gradually wearing down the teeth. Enough to see and detect a difference. Front appears to have minimal wear.
Another item on the checklist...
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
