My F80 treadmill was about 7 years old and was catching/halting when I ran. I tried lubricating, re setting the belt tightening and calibrating on my own.. but then it started throwing E2 error codes. I reached out over text and they got my info and recommended a belt replacement. He was very responsive, once parts arrived we had an appointment scheduled the same week. The belt replacement was great, I’ve noticed afterward that not only am I landing smoother on the belt, but a given speed setting feels a little faster. 7.6mph feels like what about 7.9 or 8.0 used to. So the treadmill isn’t having to work as hard to hit higher speeds. Also obviously no more errors since the repair, he made sure the belt was exactly aligned too.
Overall very happy!