Looking good Marco, bravo!

Interesting that you get errors with the second service, while Shapeways says it is good.

I know also from our printer, for example, that the printer can print models with errors
in it, while our printing check software for our printer would complain too...

BTW. Doesn't 3DCoat has not in the newer Pro version also tools for 3D printing and
checking?

You could also try printing check software like Netfabb basic etc., to see if they give
you errors too.

Regards
Stefan