Marble guide
thingiverse
On the marble machine I'm making, there are several locations where the bearing would bounce out of the track or feature it was being dropped into. This marble guide helps to keep the bearing in the location it is dropping into. 2 different versions are included. It you need a guide that faces the other direction, flip it in your slicer app.
Download Model from thingiverse
With this file you will be able to print Marble guide with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Marble guide.