I usually don't pull out of my solo cups until the foilage has gone over the edge of every side of the cup by about 1" or so, by then they're typically 6 or 7 inches tall with about 10-12 nodes (remember, the closer your lights, the closer the nodes)

Then I'll put them in a 3 or 5 gallon to finish. If your keeping one for a mom (don't if its bagseed) put her in a 1 or 3 gallon, just so she stays small and bushy.

Oh, I see your not using bagseed - You gonna turn these into moms? or you gonna clone them and flower them out and use hte clones for moms?