Gravitrax compatible flex bridge

This is a flexible bridge compatible with Gravitrax.
Tile was designed with separated lower ring to ease the print.
Bridge is made by two elements: first one must be print 3 times, the second one only 1.
Before putting the bridge elements together I suggest warming the pieces with warm water.
Print must be done with supports but they are easy to be removed.
Sanding is requested to perfectly match the elements.
I print with 0,2 resolution