Setting gridz to 0 (or anything less than zero) will only generate the base pattern. This is useful in cases where you want to use those wonderful printable holes on other models.
Height can now be defined by the unit height, internal height, or external height. Added lip toggle. Added option to snap bin to unit height. Fixed small protrusion at the bottom of the outside wall edge that made the STL look less clean. Split file into base file and command file, to allow for ease of use and possible future module expansion.