Inspecting through the grease hole, my Centa rollers look good after 12,000 miles but I will find out for sure when I take the engine out next week for Phils mods. My rollers were fitted just over two years ago and were supplied to me by MMC as "improved trial" items. They seem to have lasted better than the original early 2015 items that fell apart after just under 10,000 miles. Maybe all you need to do is have post 2017 Centa rollers fitted? That said, Phil Bleazeys mods do much more for the feel of the car than just improve drivetrain life.
My original rollers are from 2014.when mine was one of the earliest cars to be upgraded from the Harley to Centa.