To transplant a BOMB auto? again?

So I have an indoor grow that was meant to be 2 girls, my system of 1 photoperiod and 1 auto(auto finishes and then photo flips to flower). However, this grow the photoperiod didn't take. So I got this girl - blackberry moonstones auto, and she is PHENOMENAL with budsites. Video link:
My thought is my 3 gal fabric pot will inhibit allll those budsites. Granted its only my 5th grow, but I'm so impressed. What do you guys think? I got 2x100wat 301H LED lights, and thinking of the volume of nutrients that will be consumed to grow in early-mid flower, my noggin is telling me a 7 gallon(or 5) would help support her growth immensely. Or do you guys think the 3 gallon will provide damn near it peak potential as long as I am diligent?

Good size for preflower! She’ll rocket off soon. It’s either now or never if you want to transplant it.

Depends, with a 5 gallon it might be awkward as you’ll only have an inch or so space on the sides to slot her in. Biggest I’ve done is 5gal pots and they produced the most amount of bud (3 plants produced 8oz each)

She might fill out a 7 gallon since it’s early days, that should give you enough wriggle room to transplant.