Gravitrax compatible pillars and tiles. Tracks can be run through or hooked onto the base of the pillars. The insert must be printed upside down and glued into the base of the pillar. It is a tight fit, so depending on the accuracy of your printer, you may have to sand it down a bit.
I also added two tiles so you can increase the height of the pillars. Pillars and tiles are hollow, so you can drop a marble into the top.
Here's a video with most of the elements in my library. And... a preview of the lapse timer I am about to release. The lapse timer has custom electronics that I will be making in small batches. If you are interested in the lapse timer drop me a message. If there's enough interest, I could consider ordering larger batches of circuit boards and components.