A quick and easy paper towel holder. The design is print-in-place and uses very little material.
The roll is easily inserted and removed.

Two versions are included with different tolerance: 0.3 and 0.5 mm. The 0.3 mm version is the default, use the 0.5 mm version if the dimensional accuracy of your machine is bad.

Instructions:
Print the two parts
Glue it on the wall with 3M tape or wall mount glue and use a paper towel roll for distance measuring.