Re: price of mirrors: According to this site: http://www.peswiki.com/energy/Directory:Synchronous_Solar_Heliostat 1 sq. yard (~ 1 sq. meter) of mirror is $6. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist