Hey 62, I think youll come out alot better with Lst, like you said.
You want have no trouble topping, but quick flowering autos, like yours, don't yield, much at all.
I been getting alot of those quick flowering autos lately too, and they don't get very big, I like em to at least veg, 25-35days, before showing pistils -stigmas. then you'll have a nice big harvest .
Your going to do fine whatever you decide.
HappyGrowing 62.