British Rail Double Arrow

This is a test print from [oorail](https://oorail.co.uk) that is really small but can be scaled up in any 3D printing software (cura, m3d etc). If you can't see it in your software, just scale it up. This is used as a test print, it should produce a British Rail double arrow logo.

Note: This file was originally created to test out units of measure in blender which is why it needs to be scaled up to about 200% to 1000% to produce a test print. It was part of a testing process we used to map blender units to mm. We decided to share it because its useful for testing any size 3D printer (due to the small size of the double arrow at 1:1 scale).