Modified Z-coupler

Portabee 3d printer - modified Z-coupler. The Z-coupler on this model of printer is prone to breakage. This is a simple rounded off top piece, doing away with the hex flats. I have not printed this yet. It was a quick edit in Blender3d. At the moment i do not have a picture of this. As soon as i print it i'll upload one.

edit....
printed out a batch of 3 at 40% infill.