Bobbin adapter for Spinning Skein

Adaptation of the spinner/skein so it can take a small bobbin card ( https://www.thingiverse.com/thing:5445757 ) Also modified the pin to be shorter because of my own changes to the model. Still requires the original base and 608 bearing from @mshipman_632314 's original design. Made to be able to swap between the original spike and this adapter, without requiring an extra base.