Opening RL02 disk pack

[Christian Corti]

On Wed, 5 Dec 2018, Michael Fritsch wrote:
> The top of the middle part of the handle (this with the slider) is only glued 
> slighly at the base part. With a screwdriver it is removeable  quite easy. 
> After removing it, it reveals the secret of the mechanism.
[...]
> Before doing this, remove the disk from the pack, otherwise you cannot get it 
> off the magnets!

Well, this is exactly my question: how do I remove the disk (= platter) 
from the pack (= cartridge). And there are no magnets in the disk pack.

Christian