Elbow connector coupler parametric customisable

Thanks to @wariat_543655 for the original design!

This OpenSCAD code is fully parametric, and can produce couplers of almost any size and angle. You can define:

• wall thickness
• first connector outer diameter / length
• second connector outer diameter / length
• elbow angle / radius
• and more

My aim is to squeeze into a small box a lot of “plumbing”, enabling a hand-cranked 20-note organ play with electronic controls rather than punched paper rolls. The elbow bends will ensure PVC tube can get round tight corners without restricting the air flow.

The .stl files will make couplers like those in the photo: 45 degree bend, internal diameter as in the file name. My printer needs the diameter parameter to be about 0.3mm larger than the actual tubing.