Well, its been roughly a year and an update is in order. I had my army of three heliostats running in unison and I was fairly happy with them. One downside was that they didn't have quite the range of movement that I wanted. To get better range, I had to switch over to the wormgear setup. After checking a few places in town I managed to get two salvaged gearboxes from a broken electric wheelchair.
I disassembled one of my older heliostats since I needed the motors, which then had to have their shafts ground down to fit the slotted drive shaft of the gearboxes. Then all that needed to be done was drill and tap a few holes to physically attach the motors to the gearboxes and then bolt the gearboxes together with a 6" peice of 3/8 aluminum angle. A little epoxy to set the limit switches and tada!! The ElectricWheeliosat!
I did have a larger (2'x3') mirror attached, but it couldn't hold the weight in position when power was cut to the motor, so for testing, I've used a cheap vanity mirror from the dollar store (which is promptly broke...).