OK, OK, my fault ;-)
you can ignore all I wrote about this ;-)

I don't know why, but in the past Minera versions i had trouble to get my miners running with BFGminer, badly the only one on the list who supports Gridseed and Zeus on the same rig.

I tested the setup now again with Minera 0.6.1 and now BFGminer works with both without any problem.

So all if fine now I have Zeus and Gridseed on the sam Raspbery Pi.

Thanks

Stonie