i think that screen should be higher, arnt them plants too small for a screen yet, i would have topped if i was you. or let the plants grow some more.
arnt you supp. to stretch the plants,so they grow more too, and this screen is to hold all the heads, and try to get equal lite, but i mite be wrong.
i would just think that plants that size,can hold there selfs up, why the screen?.
good luck, ill be watching,never seen a scrog from start to finish.

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take me to your dealer.