Gridfinity 2x3 paint brush holder. This is a remix that added 10 more slots for brushes. Can now be printed without support.
You might want to add an outer brim to the top as it came loose on my print of the original model.
V1.0.1 adjusted to have tolerance of 0.1mm for the studs that insert into the base and top. This should provide a tight friction fit. If you need more resize the upright.
Please like the original models that this was based on if you print my remix.
nguggisberg's brush holder https://www.thingiverse.com/thing:2004428
XMB gridfinity remix https://www.thingiverse.com/thing:5907334