Laser cut binary mechanical marble computer

Laser cut marble run that gives a computational state and allows for adding and incrementing.
4Bit.
Material 3 mm in vertical elements, horizontal elements can also be done in 4 mm.
Marbles 16 mm
Edited in Inkscape.

Idea taken from woodgears.ca
https://woodgears.ca/marbleadd/
Youtube: http://youtu.be/GcDshWmhF4A

The design was modified to fit a laser cutter and European glass marble standard size.
I used 4 sheets of DIN-A4 plywood, a bunch of fine screws (2.5 x 20).