After 500 hours the only way to check the internals in a Slick Mag is to take it apart and look inside.
I cant see how without taking the mag apart how you can see if it needs servicing.
There is a difference between an INSPECTION and a compulsory overhaul/replacement. I was told that they needed overhaul, however I now have the extracts from the Cessna service manual that show what is needed and they picture is becoming very different from what certain maintenance organizations are painting.
Not to mention the fact that the only investigation work that needs to be carried out by a new company is any work done since the last ARC, not the back to birth that some are claiming. As nothing has been done to my aircraft other than the 50 hours since the last ARC there is nothing to investigate. The seatbelts can also be run on condition along with a number of other items that I have been told have to be replaced. This answer from the CAA directly.
Following some excellent advice from an old friend I shall be staying G and not going into a controlled environment.
This is just an example of how the rules are not clear enough and a number of maintenance organizations are using the opportunity to rape us.
I shall probably end up getting both of my props overhauled as one is 700 hours and the other is 1900hrs but I will stagger it over a couple of years to keep some reserve on life.