Parametric painting pyramids

Use these to support objects you're painting, allowing you to paint both sides of the object without waiting for one side to dry. These are space saving too, as they are stackable!

Four sizes are provided:
* 30mm (recommended for small objects, like a cutting board size)
* 45mm
* 60mm
* 90mm


However .f3d and .step files are provided to allow you to generate your own sizes. Simply use the Parameter called `edge_length` in Fusion 360 to change this. If you want a stronger version with thicker walls, change the parameter called `wall_thickness`.

I printed the 30mm and four of them were perfectly sturdy to support a cutting board I was oiling; large furniture or other pieces might require others.