Gears.

["Aahz." <ErickKilmer-at-comcast.net>]

        Origionaly I was trying to build a dual differential dive/stearing 
mechanisim for my tank but the smallest differentials I could find were 
way too big, around the size of coffee cans so I put the idea on a 
backburner. While perusing eBay I came across some right angle drill 
attachments that were cheap, around 4.00~5.00 and claimed to have metal 
gears so I bought three of them and they arrived today, I had them 
compleatly dissassembled within about two minuets of opening the box. I 
think if I can machine a housing for them they'll work nice for what I 
need and the gears are of reasonable quality. I'll be sure to let 
everyone know how it goes.

Erick