ER11 collet Box V1

A remix of the ER11 Collet Box by GAHarding (base only) which adjusts the storage from 16 ER11 collets to 4 ER11 collets and 4 collet clamps, without or without their collets installed. Nothing else is changed and the original lid is used.

The FreeCAD source files, using the original STL file as the model source, is included if further changes are required.

Update: Invalid stl file replaced (the size was the clue!)