A couple of months ago we did our group 4 project which involved building a model solar farm, as a result I have 2000 mirrors available. What I plan to do is to build a solar grill by covering an old satellite dish with mirrors. This will make the alignment easy. This was the biggest challenge for the students, what the hadn't realised was that if they put their eye at the centre of curvature they should be able to see it in all of the mirrors. I tried to place my camera at the centre of this array  but I couldn't see the lens in all the mirrors. Either they weren't aligned properly or I wasn't in the centre.