Them buds have still some growing to do. See the way they are even still kinda growing down the node they haven't even fattened up proper yet, your gonna have a monster on your hands. If have trouble with bending I don't know if it's to late for HST and hold them up with a cross, if you stems are having trouble holding themselves up then even if you don't apply HST I'd still get some supports on them, cause they gonna get at least 30% bigger. 2 weeks more nutes I'd say then go in for 1-2 wks flush. Good luck