I'm trying to align the NN4 (RD16 attached) with tripod legs for use with the nadir adaptor. Not a problem here. However, I remember Heinz advising to align the ezleveller to the legs of the tripod.
It proves to be a problem, as it would mean that the NN4/RD16 needs to be screwed on the ezleveller and aligned between 2 points of the triangle - I have tried multiple times to get this and it seems impossible to.
While doing this, I realised that there is a black object inside the RD16 rotator's attachment hole that seems to be loose > Just checking if this is normal? It looks like a black disc with a round hole inside.