Nice lookin' plants PepS ... I'm familar w/ tiered planting but I've never heard of letting the roots air prune while doing so, nor have I heard of it being done from a pot rather than a cup . As short as the life cycle is on an auto, I think I would just carefully remove the entire plant w/ roots and put it in a larger pot. Or remove the bottom of the pot it's in and set it on a bigger pot. At two weeks you're about 1/3 done w/ vegging, wouldn't want to slow the plant down now. Good luck and keep the photos coming ... like you said it's nice to see other growers growing the same seed.
:smokebuds: