Springy Spool Hub (customizable)

The design is also available here: [printables.com](https://www.printables.com/model/205864-customizable-springy-spool-hub)


####Design Intent

I was looking for a spool hub that could fit different size spools while, other than e.g. stepped hubs, maintaining the same width of the spool when mounted. I also wanted it to lock reliably into the spool, print quickly and with little material.
As this thing was constructed in [openSCAD](http://www.openscad.org/documentation.html) you can adapt it to your requirements in Customizer, click "Open in Customizer" above for that.

The clamp in the picture is this one: https://www.thingiverse.com/thing:2356396.

#### Customizing

If you adapt the hub to your spool sizes make the diameter bigger than the maximum hole size you want it to fit. As a rule of thumb about 5-10% plus. This guarantees that the springs have enough tension to lock it in.

#### Learnings

- The design shows that even PLA can be used to create quite robust spr