Customizable spool adapter

My very first THING!
It's a simple adapter for the filament spool. The STL supplied has a center hole of 21 mm diameter and an outer diameter of 53.5 mm.It fits a center pin of 20 mm and a spool diameter of 53.7 mm.
It is only supplied as an example design, it will probably not fit your spool.

The idea is to have a snug fit to the spool and a loose fit for the center tube.

Be sure to measure both ends of the spool because it is not certain that they have the same diameter! On my spool they differed about 0.7 mm...

Use tolerance of about 0.1-0.2 mm for outer diameter and 1 mm for center hole.

Measure and change values in the OpenScad file and generate your own adapters.

2017-09-03: New version of spooladapter.scad. Enter exact dimensions and tweak tolerances if you want to. Default tolerances set to 1.0 mm for hole and -0.2 mm för outer diameter
2017-09-04: New versions of both scad-file and stl
2017-09-17: Should work with Customizer too