Hi Brett,
Not sure if it's relevant to your project but epoxy molded gears work well for tracking and slewing with steppers. I use them on mine successfully. There are 'how to' guide here:
http://ngc1514.com/Computer/
and here:
http://lerch.no-ip.com/atm/
http://home.comcast.net/~doeason/Stepper_mounting.html
However, if I did it again, I would probably do it this way:
http://www.geocities.com/kindellism/...orm_Gears.html
Regards,
Rod.