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.stlPrinted with 20% infill. 3mm ABS/0.5mm nozzle @225C hotend/120C bed, 3 shells, 0.25mm layer height. During assembly, use the flat side to secure the PTFE tubing in the hotend and screw the 3 mounting screws directly to the effector. I used M3x16mm screws. If mounting with http://www.thingiverse.com/thing:330708, you will need M3x20mm screws.