Small World Tunnels

thingiverse

These arrows connect regular Small World and Small World Underground through Small World Tunnels expansion. You need to print: 6 copies of Small World Arrow Outside 1 copy each of SW Insert 1-6, alternatively 6 copies of the generic Small World Arrow Insert The inserts are very close-fitting. To get a secure press fit, I had to carefully shave them with a utility blade. Scaling up the outside or down the inside when printing may improve results.