Bottle Wig Stand

I need a wig stand, and I don't like any of the ones I've found on thingiverse or other sites. I also happen to have a collection of empty soda bottles. So here we are: my "poor man's wig stand". Two variants even, with optional parts!

## The _not that poor_ version

- `center.stl`: The octagonal centerpiece which screws onto the bottle and is used to
hang arms off of, or to attach the extension.
- `center_extended_10cm.stl` and `center_extended_rounded_10cm.stl`: Optional. These pieces just extend the centerpiece by a bit over 10cm. The rounded one takes slightly less time to print, and uses about 2 grams less material.
- `ring.stl`: Optional but recommended. Attaches to the ends of the arms to increase stability.
- `arm.stl`: The arm which is to be attached to the octagonal centerpiece. Print four of them for the whole set.

## The _really poor_ version

- `standalone_base.stl`: This is a base to which a soda bottle can be attached: no other parts are needed. Attach it