Hi friends,

i've got many problems to build a union with the boole function.
I'm modeling 3 parts of an fuel cell. Here is the link, where you can see what i mean.
http://www.kts-cable.com/uploads/pics/DSC06413.jpg (hope this works here)
For more pictures, take the search term "jenny 600s".

The problem is with the front surface of the indentation.
I attach the file at once. Here you can see very quickly what I mean.

How do I get the 3 parts to a joined surface? I would then smooth the edges slightly.

Cheers
Jörg