My rollers are still fine at 26000 miles, taken out and checked once a year, previous M3W still ok at 28000 miles. I do think their longevity depends on your driving style.
Still running original Morgan rollers though driveline is Bleazeyed now. Done 30,000 mls and they still are unmarked/unworn. I do keep them lubricated with high temp silicone grease and am sure this helps but I agree driving style is a factor. Tried the Bleazey rollers for a short while, they were too harsh so removed and binned.
Ian
