As Javier says, you can only see if the Centa rollers are still there with a boroscope and the standard Centa. I have removed, inspected, lubricated and refitted my Centa rollers this afternoon as part of my M3W winter service, you cannot do that without having the Bleazey mods. These rollers have done a bit over 10,000 miles with no problems by the way. Maybe the silicone lubrication helps prolong the life? It certainly smooths things out.
