MicroCube GT2 belt version attempt (failed)

Just my files if anyone wants to try again, sorry no documentation as my experiments failed. The stiffness of the frame / carriage was not enough and everything just wobbled around. Printing it slower did not help, it just wobbles slower. See video at https://youtu.be/ufwftvI2GNM

Basically you have to raise the y-carriage (I tried with meshmixer) and add a belt tensioning system to the x-carriage (I made one with openSCAD), then screw geared pulley on the motors and replace everything with normal bearings not the groved ones.