I think 1966vette broke it down pretty well. As the rental place showed me how to operate the TR, they also let me try out the machine before taking it. During this process the machine worked well with no problems. When I arrived at the client's residence and placed seed in the hooper, it worked fine for about 10 minutes. Afterwards, it started to struggle going up hills. Then it had problems moving forward on level ground. THEN, the engine stalled twice while trying to go up hill which I knew at that point this machine wasn't worth renting. My point is, if the rental place or the customer doesn't notice a problem while trying out the machine, sometimes it will not get noticed. Far as the belt you referenced. I have owned belt driven mowers in the past that never needed a 10 hour adjustment. I own a belt driven trench digger and never had a belt issue or had to adjust it. Yesterday I had to redo the seeding job the TR had initially done. Yet another decision I wasn't happy out.