PrintClosure-Extension for printer with MMU

I shortened the length of the upper plate by 18cm. This smaller plate was framed with the (door) elements 2x Z1; 2x Z2; 2x E1 and 2x E5_12cm and attached with the hinges (as with the doors) to the rear Y1 / Y2 parts using M3 inserts. The larger cover was framed on the rear edge with the elements E6_left / E6_right and screwed on the sides with the elements A1 / A2.