OK on first use

On first use, this machine has been very effective. really no problem.

From the second use, strange noises were heard inside (I thought, maybe, it was dried pasta), and the machine was not working too in the first 2 positions.

3rd ... such use position 1 and 2 unusable ...

Today I decided to disassemble this machine to see if I could possibly do something about it ...
First surprises, machine noises came from inside 4 small nuts ... nuts that were just placed on the reinforcements. Those latter not being threaded, so it's impossible to screw it ... I do not understand exactly why these rods also are not threaded ... but hey, let
Second surprise, gears graze on just the first 2 positions ... so that, very quickly, the contact is no longer ... and therefore the inner roller stops turning ... Either a gear was mounted upside down (they have a curved shape) or there is a significant gap factory ... for now, I have not found a solution to this problem ... Seen as c 'is gone, I will probably have to buy another ... elsewhere ...