Anet A6 Z-Axis dust cap

This is my first attempt in 3d modeling, using both Autodesk 123d and Autodesk Fusion 360

There are similar Things to this, but this is a design from scratch object. There is a 3mm pocket in the top of the cap to accomodate the Z-axis poking through, the sleeve in the hole is 8mm the same thickness as the Anet A6 frame.

It is a close fiting cap, but not an interference fit so the cap will not hinder the Z-axis at all

Prints fine in Cura 2.3.1 or using Cura slicer from Repetier, print speed about 55mm/s, 0.2 layer height, 20% in fill.