Hi michael thank you very much,

Here is the 3dm-file.

I post two files here, because the file 'test3' is the file you have seen screenshots of and actually no bolean works here. I have to say that I did a uniun on a couple of objects with the ring, just to try things out.
But that shouldn't matter too much for the purpose.

The file 'test2' is actually the same concept but only a little simpeler. With 'test2' I was able to do the bolean with some of the objects (as you can see in the file, so you can also see what I try to manage with the boleans) but there are still some problem objects wich i can't get to bolean 'merge'.


Thanks in advance and for the fast reply.

Denman