i agree with keeping all that toxic chemical stuff away from me.  it takes away the gift of marijuana being a curative all on it's own - right from the ground.   as to how to determine weight?  not a clue..  probably a combination of many factors.  would have to get the growers/patients, gov'ment  together and hash it out. no pun intended.  maybe  determine how much weight can anyone legally buy in a year's period?    i will say this type of plant is much like the top half or third of a regular sized plant with the same yield .  it's very efficient. i have pics, but ...maybe in my avatar...lol  i really want to meet someone else experimenting with these plants.