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You can top her as deep as you want, down to the first couple of nodes and have the lower branches grow out as colas.
Your problem is going to be giving the plant enough time to recover the 2 main colas, or there'll be no place for your buds to grow from.
Most of the buds will come from above the topping, the lower branches not so useful.
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Is lst possible? Could you bend it in two?
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