API test kit tube holder 3D Print Model

Summary
I have a lot of freshwater tanks, including fish and shrimp. I need to test the water often with kits from the likes of API.
The tubes are very slim and fall over very easily, so I wanted to print something to hold a lot of tubes whilst testing the water.
This is the simplest snap together thing I could come up with.
Hope someone finds it useful.
Print Settings
Printer Brand:
Prusa
Printer:
i3 MK3
Rafts:
Doesn’t Matter
Supports:
Doesn’t Matter
Resolution:
0.2
Infill:
25
Notes:
Printed at 0.2 layer height, with 0.8 walls and surfaces.
infill can be anything you want, but 20 or less is perfectly fine.