anymore i dont top at all unless i desperately need a clone( indicas:thumbsup. but lets not lose sight of that root zone either. just because you dont have 4 feet of plant in height doesnt mean you dont have 4 feet of plant. screens are awesome but only a growers patience will bring the best out. screens are also somewhat speculative especially with a new strain. so my thought is with longer veg periods and factoring in stretch you should do better with a larger root base. lst is similiar to a screen and very effective and wont take as long as a screen. it can even be used in sog format. also you wont need as much root space. a well set up screen is a thing of beauty, though and will enhance yields.