Based on an OnShape parametric GridFinity generator, adding ears and a latch. Designed to hold 6U or 9U GridFinity bins (or heights adding up to 6 or 9) securely and remaining stackable.
Note, The original photos are from a prototype and the baseplate now has flat surfaces on the corner ears for easier press fit or screw attachment.
The holes are 2mm, I use press fit welding rod but it also may be fitted with screws.
The author marked this model as their own original creation.