So I redesigned the antenna mount to fit a 5G antenna, and fit around a 4,3cm metal pole.
I used for 4x m8 bolts, washers and nuts to mount it securly to the pole.
I setup my printer with the following settings (to make it even stronger, for the outside weather):
Models are also available on onshape.
The author remixed this model.
Redesigned for 5G antenna, shaft is longer, and also fit around a 4,3cm metal pole. Changed screw holes, and made it stronger for the extra weight.