Niche Zero Weber Blind Shaker/Tumbler mount

I am trying out the Weber Blind Shaker / Tumbler (can be seen with both names), but I didn't want to sacrifice the option of using the original Niche cup with my grinder.

I modeled the original cup holder and added cutouts for the Weber Blind Shaker to it. 

You can add a magnet to the underside (where the screw goes), but I haven't seen the need for it. In my case, the Weber and the original cup sit nice and tight.