I would say with a height issue you may want to LST, but Im not completely sure on that. Im just assuming that by staking out and training your plant it would be better than topping and STILL just letting your plant grow up not out. All topping would do is give you a few more tops instead of one single. It would slow down the growth a bit at first, but would then pick back up once the plant healed and instead of one top growing up you will now have a bunch. Practice LST would be my guess but Id wait for a few more replys