Ledge Marble Run Piece

My marble run piece is a system of ledges. I built it using OpenSCAD. The marble comes down vertically and bounces of the ledges. You can barely see the marble because it moves at high speed. The ledges are a module. The thumbtack holes are also a module. My piece is designed to attach to a wall, but it can be attached to any thumbtack-compatible place.

Link to video: https://youtu.be/j-UIGkUM6Es