ET, thank you. I had a stoned moment with my scheduling also, I decided to run 12 wk strains at the begining of the year so now I'm scrambling to get my 45 day strain on some tables to offset the wait time.
I think its the first you have mentioned the grow bags. I used to use 3 gallon grow bags full of hydroton to flower in (also tried 1 gal). I was dissapointed with the bags becuase they lack rigidity. Just lifting a bag up causes the hydroton inside it to shift, often resulting in root damage. Your idea will work if the root mass is big enough in the bag to hold all the hydroton together. If it is not, when you cut the bag open the rocks will "run" potentially damaging your root mass. Oh, also, the bags like to hold a bit of water in the folds at the bottom which has caused me some root rot issues in the past. It's worth trying a few out but I wouldn't advise putting all your eggs in one basket so to speak. I'd be interested to know how it works for you, adequate veg time should help eliminate some of the problems. Hope some of this helps. Good luck