Gravitrax Loop variations

Visit https://www.thingiverse.com/thing:4538769 to see the full collection
All my gravitrax things: https://www.thingiverse.com/imshogun/collections/my-gravitrax-creations

DISCLAIMER: I strongly recommend buying the original Gravitrax sets. I'm only making parts that extend the great original gameplay as they cannot be found in the original set. They either add a new possibility or simplifiy/change/complete an existing one.

These tiles derives from the "loop" idea from @basti_vapes:

- First tile fixed the low polygon issue;
- Second add a "fallthrough" option.

This is the first part of a -soon- growing collection of tiles on which I (re)designed from scratch (from the calliper to the end). I also adopted a new way to print the bottom hexagon that attach the tile (it is a separate print that is inside the tile and that you'll extract and then clip on. I thought it would be cool to need no supports nor a separate print :-). Hope you'll like it)

IMPORTANT: I was very car