I can taste the scorpions from here!!
Looking good! Yeah for such a short veg time I would personally avoid any slight setbacks like topping...I top all of my plants at 4 true nodes(removing the lowest set of branches that come from the single leaf), and I tie my trunk vertically and results are staggering, but like I said I have a much longer veg period.
A local friend I showed different ways to grow, decided to experiment and not to top a plant this year(DNA Lemon skunk) and "tower" grew to a massive 16feet tall....but in the end it broke in half in a heavy windstorm, and had severe root stress from the heavy sway. Not really something you need to worry about I don't think though with the short veg period. Anchor branches to bamboo or hardwood stakes and I think you will be fine.