This is a big 3d printable loop, the two base pieces print in their upright orientation. The two top pieces need to be supported and can be oriented as you see fit (i face the track side up so all support would be on the outside of the curve.
You will need to print 6 of the LoopToTrackConnector.stl and 9 of the SlimConnector.stl along with Parts1 - 4.
See it in action here: https://youtu.be/ozXN3ObM6nU
LoopToTrackConnector.stl | 4.2KB | |
Part1.stl | 322.8KB | |
Part2.stl | 329.8KB | |
Part3.stl | 319.6KB | |
Part4.stl | 321.5KB | |
SlimConnector.stl | 92.8KB |