Marble Mountain

Inspired by the Marble Machine by Tulio (https://www.thingiverse.com/thing:1385312) I thought I'd have a go at making a marble track. This is my first attempt, and biggest print I've done on my printer so far (36 hours).. Mostly happy with the result...

The track works with 3/8" ball bearing spheres. The 10mm voids left for the spheres turned out to be a touch too big once printed so they don't quite snap-in as intended.. some high viscosity cyanoacrylate should nicely fill them in and secure the spheres for intended use.