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I really like the box customizer. Thanks for the work. I do need to report a small bug. If you make the depth 30mm then the tab prevents the top and bottom from coming together due to the width of the tab not taking the front/rear plate ridges into consideration. Making the box slightly deeper resolves the issue but prevents me from making the depth I need without manual notching. Suggestion for future refinements: 1) Checkbox for through vents (using code below)
2) Checkbox for no vents

This is definitely my most favorite customizer!