Bobbin Case customizable parametric improved snap on hinge

This is a remix of https://www.thingiverse.com/thing:1812854

The hinges have been changed to snap on, without requiring a separate metal pin.

A bobbin size chart is included for common styles, to make customising easy by simply choosing from one of the following styles in the table (or "custom" and edit values in the table):
* Singer-163131
* Singer-8228
* Bernina-0115367000
* Bernina 8-Series
* JUKI
* VIKING
* Class 15
* Class 15
* Class 66
* L-Style
* M-Style

I have included a pre-rendered a version of each of the styles above, ready to print.

Hints:
* For pieces to fit well, I recommend calibrating your printer's E-Steps and Flow (tutorials are easily found on YouTube)
* To make sure, print a test before the entire thing - simply bring the STL into your slicer software (eg Cura) then drag it down below the print plate, so just the hinge section prints. This allows you to test how well that clicks together, and how smooth it turns and catches, before printi