Spool Holder with style

Why so many spool holders ... because it's cool.

A friend of mine gave me a good idea to use less space for the spool holder. In fact, with this spool holder, you can install two brackets on the same side of the printer for a double extruder setup.

I also included the Openscad source file if you want to customize it. Since the source file did not work well with the built-in customizer.

The definitions of the variables should be clear enough to allow everyone to use it.

Basic variable