Prints without support. Scale the size of the ball slightly to get the best fit for your print settings. Snaps together by hand, but is easier in using a vise to press the ball into the socket. Use a piece of wire or two screws as a cross pin. Fits the FT Mini firewall size on one end and most motor configurations on the other. Uses standard 9 gram servos directly glued on the back or in whatever configuration you want. Have fun with it.