You can manage it with LST and long long veg. I did it with some Sugar Punch (12 and 14 week veg under CFL's). Shorter veg (6 weeks, and only 2 tie downs rather than about 15 on the long veg plants) and more sat dom plants this time and they're a little more unruly and uneven in height. Can't help thinking the screen suggestion of previous posts, combined with the shorter veg time would sort this. You could tie down to the screen too (that is the method I suppose, stating the obvious...but also thinking through the flower run I will be switching to in a few weeks).
Any quick tips anyone wants to share on screen construction? Better one screen for an entire tent, or a screen per plant?