Marbleworks Compatible Spiral

This is a part of a parent collection of many different marble tracks compatible with Marbleworks Grand Prix marble set. See remix source for larger collection of marble tracks.

This was adapted from the [Marble Run Collection](https://www.thingiverse.com/thing:70278) spiral design (remix linking is struggling to link the design directly). It makes a spiral around the tower looping twice. Kid favorite choice.

*EDIT* Updated to have an anti-jamming design in the tower feed to the spiral.