I have not had any issues with belt jumping or the like, but is quite loose. Can easily get more than 10 mm deflection of bottom run. I did notice yesterday as I was starting to prepare for bevel box removal that the bottom belt was very close if not actually touching part of the frame. When fully jacked up it very definitely fouled the frame. This might complicate any deflection testing Mine is a early 2012 model, lowered at front to level off the steering arms. When I reassemble I will look to be a bit tighter.
