I was wondering that myself, as I thought the pistils were still a bit "crazy." I've had some trouble identifying the calyxes and what they SHOULD look like when it's done flowering. I have been watching the pistils for color change.Personally, I wait until the plant has pretty much stopped throwing out pistols and the pistils have receded and the calyxes have swollen up. I'd say you have at least two weeks. I know there's people that chop that early though, I just wait until the plant is done or at least almost done flowering. Your plant is still actively flowering.