Kossel Mini effector for G3D Budaschnozzle

Added 3 mounting holes to original effector. I had to print with a cooling fan to get the contours to print cleanly, but I couldn't get the fan speed low enough to avoid curling on my Cupcake, so I added a 0.5mm thick brim to help with first layer adhesion. It's fairly easy to shave off after the fact and resulted in a great print. Remixed from effector.stl at https://github.com/jcrocholl/kossel/blob/master/effector.stl