Maybe the solution is simple. In the Solid Works 2009 by Matt Lombard, Page 307 we find the normal way, like in CATIA V5, but in the end we have "NOTE: Under normal circumstances, you cannot get the Move/Copy Body feature to mirror a body. Solid works has applied some magic pixie dust behind the scene to make this happen."

Well, I like copy only a part (the funnel) but an error message occured so like: I have to deselect gemetric pattern in the checkboc. After I did this, another error message occured: this feature can only modify an existing body. It cannot make a new body.

OK, how can I mirroring the funnelpart between the knee and the flat long body, sea attachment.