OpenGrid custom shelf mounting bracket

The openscad code allows you to customize and adjust overhangs and placement of the mounting holes.  I use an M4 and M3 brass heatset insert and a 25mm M3 bolt to clamp the mount tight onto the bar.

The shelf in question is available https://www.amazon.com/dp/B0CW9QHKRT but this could work on any rectangular bars (size is just an openscad parameter).

I also designed a mount variant with an elongated hole for when your mount placement isn't 100%

This is complementary to the opengrid ecosystem.  You can buy this shelf and replicate, or modify this mount to other things you want to slap opengrid over.