Ya you totally could start earlier, i guess the slowness is only really going to be a drag once in the beginning. I still hate losing a big arm, and would want to see how fast an mj plant took to grow new leaves with a bigger branch of a clone, i ponder if the roots below would be like, 'ok good for you up there, but we're just going to need that much longer to catch up',.. but they would have more solar collectors above to help do it, so thats good.
Edit:
...and my plants would grow just the same in 3" net pots, cept they wouldn't stand as well. I bought some real tough 3" pots, but even they will fall through a hole or get tipped in a hole. I don't like the
6" net pot bucket lids for what the plant has to grow through, but i do love that they never fall over or down into a hole.
I'm thinking i make some sort of bubbler to get um started, nothing but those foam collars to hold clippings till the roots are long enough to fish down through something bigger.