Great puzzle! I got ahead of myself and had to start all over again b/c although it's MOSTLY symmetrical, there is a discrepancy in the 9th line verses the 17th line (going down). One has 17 squares in a row...the other has 15 in a row. So make sure to pay special attention to those rows! If you start with the horizontal symmetry, and then just follow the logic from there, everything will fall nicely into place! Just dont try to make it vertically symmetrical and you will do just fine! Thanks for the beautiful puzzle and a lot of fun! ~:)