Parametric Stevenson screen

### **STATUS**: This is still a work in progress. The model seems sound, but I haven't printed it out yet because I'm waiting for hardware.

#### Changelog

* 2023-01-19: bugfix, removed rod shaft overhangs in roof model
* 2023-01-17: added optional hole for wires to the floor, small typos
* 2023-01-16: initial upload

#### Description

A double-louver, cylindrical Stevenson screen that you can customise to your heart's content. I've done my best to make the parameters easy to understand and configure, especially via the Customizer in Thingiverse and OpenSCAD.

If you have a small printer like me, you can specify the outer diameter, height of a single ring, and louver angle, and let it calculate the inner chamber diameter. Or if you need a chamber of a certain size because you have a big piece of measuring equipment, you can specify the inner diameter and let it calculate the outer chamber diameter. Or specify both diameters and louver angle, and let it calculate the height