Customizable USPS Mailbox Replacement Door

Customizable replacement door for a USPS-standard steel or aluminum mailbox. House address can be customized and highlighted with paint or filament color can be changed during print.

For printability, a knob is not included, but you can find lots of knobs here on Thingiverse.

Suggestions welcome. Check dimensions.

[Update 10/26/20: Slightly rounded the outside edges, but note that the "minkowski" operation results in longer rendering times.]