ON30 track gauge
thingiverse
A 3D printable track gauge for ON30 trains based off a drawing in a model train group. Please do NOT sell this model as it is intended for personal use only. Idea is since ON30 gauges are hard to come by you can quickly have a track gauge for checking clearances of structures, tunnels and the like, not for checking your track gauge, flanges... so on and so forth.
Download Model from thingiverse
With this file you will be able to print ON30 track gauge 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 ON30 track gauge.