It all depends, have you been checking your trichromes? If not or you don't have a microscope or magnifying glass then go by the hairs. If I don't have a microscope I try to pull when there is 50-75% orange/red/brown hairs. Looks like it could go awhile longer though. IMO wait a few days to a week but it is up to you. Btw what strain is this? The leafs look rubbery and shiny and lots of leaf compared to calyx.