About this 3D model

Inspired by the Itty Bitty Belted Extruder, i made my own set of GT2 pulleys for the Wade extruder. I made an 80 and 104 tooth version. Both fit together with a 20 tooth pulley on the stepper. However if you use 20/104 tooth, theres not much space between the pulleys (in my case <1mm). The gear ratio is 4:1 for 20/80 and 5.2:1 for 20/104. Video of 20/104 tooth in action: https://www.youtube.com/watch?v=waCqziGQ_W4