hair brush

Another go at creating a usable 3d printable hair brush. My daughter broke the last one after using it for quite a while, so it was clearly too flimsy. She also informed me that the flat pins were oriented the wrong way... which they of course were when I actually think about it.

Anyway, I have managed to get a better grip of the beast that is FreeCAD since then, so instead of just making the pins a bit thicker I made a new one from scratch. The 'bed' that holds the pins now has a doubly curv