Yeah I did it in week 3 of flowering with my Trainwreck, which was supposed to hermie anyways... Turned out there was no trouble at all. The reason I did it was that it was in a 10L bucket, and the roots were really bunched up when I checked it. I put it into a 23L container...way too big, but at least big enough to finish the grow with. This time I'm gonna use 15L, and see how that works out, but I'll try to transplant them before I switch the lights this time.