gears VS BOSL2

They have a list of them here, and I personally use BOSL, gears, threadlib, and tsmthread for NPT/ACME threads.

Give us some images. Show us how to make a cube, how to put a cylinder on any of its faces, how to import and call a custom OpenSCAD function (ie: a gear from https://github.com/chrisspen/gears), how to sketch stuff (just slap it together quickly, in case I don't really know what I'm making yet), how to finalize stuff (add the doc strings, etc., at this point).

There are also some excellent gear libraries for openscad. I use this one extensively: https://github.com/chrisspen/gears

The BOSL2 equivalent is https://github.com/BelfrySCAD/BOSL2/wiki/CheatSheet

I used the BOSL2 library for the threads. Much easier that way!

https://www.thingiverse.com/thing:5905001 - Thanks to BOSL2, once I've defined a few constant, the entire source code is one (long) line:

I was heading down this path, but stumbled across this library that has a TON of really great functions: BOSL2. Lot's of useful stuff here and not just strings and math. I used format_fixed() to solve my problem. It doesn't seem to accept math functions in the call, but that is easily solved with an intermediate variable.

It won't be easy, but try using this: https://github.com/revarbat/BOSL2/wiki/beziers.scad

BOSL2 has a function for bending a polyhedron around a given radius but it's one of those functions that are super powerful but not very clear about how to use effectively (maybe that's just me).