So i went to 'Aarschot' to print and test the document. The project will be printed out 2880mmx1380mm. After a horribly long riptime and discovering a lot of new features a pre-press document was printed on scale. A good result set the green light for production and within a few days the print will be at my disposal.
Thumbs up i guess.
** Very good services at Grafixprint