Spool handle v1 - 53/103mm

A spool handle to be used on top of 3D printer frame. Originally designed for [Monkeyfab Prime3D](http://3dwpraktyce.pl/prime3d/), but the handle should also fit similar 6 or 7.5 mm thick frames.

The axis and the 2 round plugs are designed for 103 mm wide spool with 53 mm internal diameter. Maximum external spool diameter is 30 cm. Handle can be also used for loose filament without a spool - see the last photo :)

There is a thing variation for another type of spool - see http://www.thi