HE3D EI3 Dual Z Drive, Top / Bottom bearing holder - small

The HE3D EI3 printer has a dual Z guiding but only a single Z drive on one side. Further more the clutch is mounted on the top side. Mountiing it on the top side creates a lot of axial force to the clutch but the clutch is not designed to cover this kind of forces. Consequently it deforms the clutch which can have a negative influence to the print. From an engineering point of view it would be better to have a drive at both ends and a bearing which covers the axial forces. In this case the lower