Customizable Wall Mounted Box

I'm working on an update/overhaul to this using patterns/code from my Customizable Fan Grill Covers script - https://www.thingiverse.com/thing:4837562/files

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Some gifs & images here - https://imgur.com/a/PbfVGqU
If the customizer isn't working today, check out https://www.dr-lex.be/3d-printing/customizer.html

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V3 Update:
Added optional stuff:
--permanent screw mount
--an divider/spacer

Fixed
--The size settings for the box are now the external sizes, there was a small issue so length was internal but width was external.

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Options:
-Size
-Mounting Type (Permanent screws or slot in/out using 3M mounting pads)
-Pattern (None, Lines, Cross, Hex, Filled - all can be customized)
-Mounting Block/Screw Hole size for mounting
-Optional Dividers


I've tested this loads, but please check the exported .stl files before printing & please post a make if you print this.

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If you don't need it wall mounted at all, you can set this in the