Support for Gravitrax 180°

Use when heights reach 5mm or more. The 180° & S-curve for Gravitrax designed Transmit1 that was published on January 4th 2019 is very cool especially being one of the best 3D-printable expansion pack for your Gravitrax marble runs. However, the 180° variant does not fit snugly into the rail holes, rendering it usable only on the ground. I usually used height tiles only, but I wanted more stability. So I designed this piece such that it fits into the 180° variant snugly with a clearance of 0.1mm. If yours does not fit inside it due to "poor tolerances", I can upload another file with a clearance of 0.2mm.
Enjoy!