Customizable Ultimate Hobby Knife Cover Creator

The name pretty much says it all. You can create a cover with a solid barrel, or trim it around the blade if your into minimalism :)

All values in MM.

v1 used features from the latest version of OpenScad which are not supported by the Customizer yet. I've fixed this and now v1.1 should be good to go. Also added more over-sampling on all edges to avoid impossibly small geometries.