Gear rack for spirograph

This gear rack is made for 3mm gears from Wild Gears or Spirograph. Most generic or novelty sets should also work, even some 3D printed gears. The gap is 4mm with a 2mm divider and the racks are just over 6 inches long. The rack could be used for storage on smaller gears. On larger gears, it could be used to stage gears for a project, so that you can pull the gears you need ahead of time and stack them smallest to largest. Use one rack for unused project gears and another rack for used project gears. This should reduce the confusion over which gear have and have not been used.