About this 3D model

This is a simple ball drop machine. It is designed to be easy to print and very tolerant of printing flaws. It prints in 4 pieces. The gears are attached with metal pegs and a small washer. Everything was designed in openSCAD except for the upright portion of the frame which was done in tinkercad. https://www.youtube.com/watch?v=y_nTN3qEn4w&feature=youtu.be