Customizable Container with Knurled Lid

customize your own container with thread.

Please find attached a example that i needed to cover my 58mm camera lens.

Replace assign() with let() in reason it will be removed in future releases of OpenSCAD.

Replace line function height()=max(2*(thread_height+bottom_thick),height); with function height()=max(1*(thread_height+bottom_thick),height); in reason to offer flatter container.

correct license code in OpenSCAD file to same like offer in Thingiverse source. (cc-by-sa 3.0)