The high piont from robart I think is out'a production but if you can get one on ebay its the best there is. I use a cheap knock off from dubro called the Tru-Spin. It works well and has several differnt ways you can use it. This allows me to balance the smallest prop, engine mag, and even my helicopter's main and tail rotors and drive gears. And yes, you really need to balance everything possable that rotates. Piper