I downloaded & printed a couple of the blanks from Design To Refine & once placed in my toolbox, I found that they were too “thick” or high & interfered with how my wrenches sat in their holders

Imported the models into slicer & they now have a height of 6.01 mm

I also “flipped” the models so that the design on my build plate, is what is visible when the blanks are in use

Top & Bottom shell have 2 layers & are 1mm thick with only 4% sparse infill