What are your temps running? I dont think you mentioned an exhaust.

Also, I would tell you to get that plant into a bigger pot but unlike what weezard
said I would make it permanent and not transplant before 12/12. I never saw the point in risking another transplant. Yeah, I'd go right into a 5 gallon bucket/bag...soon.

Another thing I'd do is when I transplanted into the 5 gallon is bury the main stem a few inches. I'd go right up to the lowest leafs. Doing that will get rid of some of that stretch and make your plant a bit more sturdy for the upcoming heavy nuggets I know you'll grow!:greenthumb:

Oh and when you transplant bring the dirt to the top. Dont be shy with the soil, use your whole container!!