Great job man! Not to mention...Go Sox! Yankees Suck!
Those little folded up "space blanket" emergency blankets are definitely the same thing as mylar, just not the name brand. The generic name is "aluminized pvc foil" or something like that. Anyway they are almost as good...maybe not quite as thick.
As for scrog...
You know those decorative trellis things people have in their yards that grow grapevine on them, and they grow into sort of a square tunnel of grapes? Thats what scrog is. Picture having chicken wire(some kind of very large screen 1-2" holes) between your bottom and top tubs. Then as the plants grow through the holes in the chicken wire you tangle(weave) them in it a bit, forcing them to grow sideways along the screen, rather than up. You keep doing this in veg until the screen is about full. Then when you switch to 12/12 colas start growing all from the same distance from your lights, and evenly spaced too.