A Gridfinity holder for both the iFixit Mako and Mahi Kits in their boxes. As the boxes are more than 4U wide I made this double holder to safe 1U instead of adding dead space for a single holder.

There are two variants you can print a 9U high stackable design and a non stackable design with an open top.

Required Hardware

• 4 screws M3x5 for joining the halves

The screw size is a parametric parameter in Fusion 360 so you can easily set a different thread if you want to but the length is limited to 5 mm.
There is also a parameter for extra space if the fit is too tight on your printer.
The inherited parameters for the base width etc. should probably not be changed.

Notes

Made with the personal version of Autodesk Fusion 360 therefore non commercial only.

Source files included.