i think some of the small design changes betweent th 4r/s and the 5 have made the belt issues better. my CT5 only has belt/gear issues due to small rocks/pebbles chewing them occasionally. only had the belt come off the gear once. and again, it was a small rock getting stuck in the gear. othere than that im nearing 2 gallons. issueless!!!
Timmahh