You can't use passive systems like that for pointing a mirror at a stationary source since they will aim the mirror straight at the sun. The whole point is that the mirrors form a parabola and that you point each mirror slightly different. Passive hookups like you describe would aim all the mirrors in the same direction.

I've done some toying around with this and came up with a system that can run off a limited number of motors.

http://pics.ww.com/v/jacques/renewables/concentrator/8.jpg.h...