Here's some crappy pictures I took;
http://www.shutterfly.com/lightbox/view.sfly?fid=740963cadca10fdd6cdd16a80fdf8c46#1264984027187
The link says there are no photos. Can you repost. I am sure others would like to see your layout since you are at such a high level. I use graph paper to design my layouts and I use colored marker to show my tower placements. While playing the level I will make chages to the layout based on my weaknesses. On this map, only afew will make it near the end of the second row. When that happens I can sell the entry tower and block the second row forcing the bots back to start.
Red-rocket
blue-slow
grey-SAM
Purple- Artillary

