2n2r5 Parametric 2 Piece Interlocking Spool - 100% Printable

##This is my take on a printable filament spool. I had a few parameters that I wanted to design to.

###Thanks to Jesse for this great thread.
http://www.soliforum.com/topic/3024/reviews-of-printable-spools/

It really helped narrow down what I was setting out to do.

* Entirely printable (including center hub)
* Interlocking connection in center of hub
* Ability to change inside and outside diameter of center of spool seperately
* Tapper ability for both inside and outside of hu