Does anyone have an idea as to where I might find a plastic gear six inches in diameter with 57 TPI? I want to put an arm turntable on my robot base and turn it with a DC motor. I will build a servo channel into the P2 and use a multi-turn Pot as my position feed back. Or if I can get it to work I will use an AS-5040 that I have for the position information. I haven;t tried to make a 5040 function with the P2.