Gravitrax Compatible Elevation System

This thing is my solution to the problem of needing too many "elevation" blocks to build bigger Gravitrax tracks.
The stock boxes contain only a few, and the large transparent platforms are sure a nice way to build elevated levels, but tend to get in the way, being so big.

I have found a few solutions out there to achieve the same result, but none of them really suited my need, since I wanted something that would:
- *print faster* (parts that could be printed horizontal, laying down)
- *be modular* (no big columns or bridges printed all in one piece)
- *be fairly sturdy* (not fall apart when marbles ran across it)
- *be hollow* (allow for tracks and jumps to happen below the elevated plane)
- *be compatible with my [6-Exit Basic Tile](https://www.thingiverse.com/thing:3552100) variation*

I am supplying different heights of pillars, each height (apart from the 140mm one which I needed specifically for a project I'll be sharing in a while) is 30mm longer than the previous o