The first question is ask is why you want 4 0z per plant.
Training and extra Veg does cost time and money, aim for 1.25 to 1.5 oz per plant , run a few more plants instead and veg for 2 weeks (use cree 3590s), tip only once (only the top) before introducing to grow room, transplant time is the perfect time to tip them . Spread those limbs to the ground by pushing down the branches during the first 2 weeks of 12/12..... a tear in the trunk is fine it heals in a day and will hold the spread then leave them alone.
once you get white pistols dont touch the plants those white hairs are damaged easy.
Scrog is not the most productive method due to the extra time lost vegging and training , sog is also not because of crowding and small trucks,(small plants) , choose the middle ground between Scrog and SOG.
I recommend sweetseeds green poison fast version, or dinafem industrial plant or Incredible bulk but is a few weeks slower, Green poison fast version is my fave (done in 47 days) just wacth for hermies, its sensitive to stress but if the odd ball is picked off before they open they dont produce any more.