bitPimps.lixlink.com

I was on ebay just looking at all things micro RC and I ran into these: http://cgi.ebay.com/RC-Boat-Car-Ship-CN ... 35a46a9664 4mm CNC U Joints. I did a quick conversion in my head (you might want to check my math) but 4mm is about .15 inches... .15 is very close to .1666 or a 1/6 inch U Joint. Might come in handy eh?

Fits 4mm shafts, which are quite large for micro... To give you some perspective, my RC planes put out between 1/4hp and 1/2hp, and have a 3.125mm (1/8") shaft, which of course is smaller than 4mm.. I think they are a little large for what you're thinking of, unless I don't know what you're thinking of... lol

Oh, I guess I should have read that more closely...I thought they meant the O.D. was 4mm.