The Unlimited Box Maker

The excellent [Ultimate Box Maker](http://www.thingiverse.com/thing:1264391) with more features:
+ Extra ventilation/decoration on top (`Vent_extra = [0:No; 1:Yes]`).
+ PCB adapter (`PCBAdapter = [0:No; 1:Yes]`) allows you to replace PCB without re-printing the entire bottom shell.
+ Extra PCB feet (`PCBFeetXY`/`$PCBFeetXY`) allow you to have more/less mount points for PCB.
+ Both panels can have cutouts and text.
+ You can cut text and add basic shapes to panels (including 3D shapes like cylinders with holes for mounting components)
+ Honeycombed holes (`HexGrid = [0:No; 1:Yes]`) in the bottom/top shells and PCB adapter (requires `honeycomb_mesh.scad` from [Honeycomb mesh](http://www.thingiverse.com/thing:1701435)).

The module was equipped with "public interface" which you can use in your scripts without the need to change the module (refer to the provided `U_Box_plus_test.scad` for the sample).