Toro mx5060 question

[torialto]

I have less than 8 hours run time on a Toro mx5060 and I have already broken two deck drive belts. I have checked alignment of the two idler sheaves as best I can by looking at the wear pattern on the idlers. I love the machine but, the belt deal is a pain. I am cutting about three inch grass at the 2 1/2 inch cut level running slow. Anyone having the same trouble with the Toro ztr...Any recommendations? Warmest regards, ray h