This will work with Parallax (Futaba) servo motors. For my project I needed the Wii controller head on it, but I did not include it in the .thing file. These parts are design with the intent of tapping the holes. #4-40 for servo mounts and #2-56 for the servo horns. I have done this several times and it works great. Use 4 wall shells to accommodate the taping. There are 4 nibs all slightly different size, just use the one that fits the best for you.