Another 2-3 weeks, definitely. And personally, I would lean toward the latter. Give them another week of feeding and flush them after that. Get one of those small microscopes and take a look at the trichomes in a few days. That would be a great idea. That is your best bet in deciding where you are at. It really depends on where you like it though. If you are looking for weight and/or knock- you-out type shit, then lean more towards the 3-4 week period. If not, then chop a little earlier. Either way, look at your trichomes. That is the best way to make your decision.