Gridfinity weighted baseplate for 10g tyre weights

It seems I can't find the weights that Zack Freedman used in his original weighted base plate. In the UK, tyre weights come in 10g/5g sizes, approximately 24x20x4mm for the 10g size. This is a baseplate that accepts these weights.

This is basically my #gridfinity honeycomb shelf without the honeycomb parts, 0.5mm thicker, and with spaces for the weights. I've not tried to add any spaces for rubber feet (I haven't been able to source any that look good).

This is a parametric model. I've generated sizes here up to 7x7.

Source is here: https://github.com/sffubs/gridfinity/blob/master/weighted_base.py