I have had the same problem.. i have just taken and done a "supercropping" tech... do a search for it. I had a plant that was maybe three weeks in flowering and was just towering over the rest. I pinched that plant in the area to where it would level it with the rest of the canopy.. now when i say pinched i do not mean pinched off.. just lightly worked my fingers around soften the hurd and it leans over and the plant was fine and ending up being one of the best plants in the room.