Erroneous geometry beyond body of 1u

[BenBreaksThings]

When creating a NxNx1 bin (not tested in lite or vase), there is a single line perimeter protrusion out of the bottom exterior that interferes with the exterior chamfer. Changing it from 1u to anything larger will eliminate the error.

[Ruud]

This artifact is due to the lip needing too more vertical space than the height of the bin. However, a bin of gridz =1 is useless, the height is like 1 mm taller than the base. For now your workaround would be to disable the lip and probably add 1 to gridz to make the bin usefull.

We can go forward with this artifact multiple ways here.

• Disable the creation of bins where gridz <= 1. They are useless as the base is almost the same height
• Shorten the base in the z height. Keep in might this might break compatibility with custom created bins as the is always the same.
• Add the missing height by removing the lip to the wall when lip is disabled. This keeps the total height of a bin created with enable_lip = 0 the same size as a bin created with enable_lip = 1 which makes a bin of 1u not useless anymore.
• setenable_lip = 0 by default when gridz <= 1
• Add a cut which cuts everything below the minimal allowed bin height (without base) which allows the user to create anything they want, even a 1u bin with a (partial) lip.