I just love experiments!
Those pots look uber-cool and the idea seems sound enough. Would be a bitch getting her out of there to put in a bigger pot but I gather that that's her home for the duration.
When I transplant I pre-moisten the new soil to the point that it clumps up when a hand full is lightly squeezed. Then prepare the new pot and soak the whole thing down good using low level nutes with some Thrive after the plant is in place. Or using a bread knife cut the root ball down to about a third size and put it back in the same pot with new soil. With the kind of nutes we use the plants could grow a lot more plant if it wasn't wasting so much energy growing unnecessary roots.
Like right now my mum probably has roots winding all around the root ball and the ball itself is likely only 1/4 full of roots. If I chop off most of them and re-pot the next root ball will be saturated with roots except for the top couple of inches. I'll have to do a little pictorial of a re-pot to illustrate what I'm talking about.
Your girls are sure looking great and I'll wager you'll be getting sick off trimming before your done with your next crop!
Good luck and good growing OMM!
C'ya L8r ya old fart!