I have cut so many holes in that bag to vent the soil that it looks like its all mangled. I may cut the bag away so I can put into a smaller container.
Dude have you heard of air-root-pruning? I'm sure you probably have, I was just thinking this might help you out since you were talkin about cutin holes in the bag to vent the soil. I use a pot that allows the roots to grow out of it, and then they die. Which then makes the roots still in the soil branch out more, using up more of the soil, eliminating a plant becoming rootbound. Pretty much, you can have a larger plant, in a smaller pot. And since the soil drys out faster. You have to water more, which means you also have to feed more if you fallow the water/feed/water/feed/water/feed cycle like myself. Which means more nutrient uptake by the plants, so healthier plants and more weed basically. lol, here's a pic of the pot's I use for the air-root-pruning. That chunck of soil is from a already harvested plant. As you can see, you CAN'T see any roots. Thus, no problems of being rootbound + more nutrient uptake. Just an idea I thought I'd throw your way!
I'm digging your grow man, and I'm sub'd BTW. Hope you try out that MRS shit that we were talkin about!
-Hookd