Balltrack - Pipes Lock

Pipes for ball track with 40mm grid and 20mm inner diameter holes. 

Pipes has same lock as cubes.

Set contains lengths 10, 50, 90 and 130 mm.

I recommend printing from light translucent materials so that it is possible to follow the movement of the ball. 

My print is from PETG.

First version I'm going to improve locks.