first of all thank you Mike for your fast response.
I really appreciate that.
DL2 = SL1, DH2 = SH1 and the reverse... DL1 = SL2, DH1 = SH2
I know the adressing stuff between 2 objects.
But it's not obvious for me how to integrate a third object.
A Broadcast is no solution.
I'm in the dark.