We already covered that. the 'manifold' is the specific 8-top that fans out from the first two limbs (the instruction pic) instead of repeated topping which is 'mainlining' the nutes directly from the trunk up an equal path to every top.
@Zaphod420 Here we go. Short and simple: 3-toed leaf, I take even the prettiest limb. The next node is going to generally have more uniform structure. If you are in a rush keep 'em if they are even. You'll likely end up with 4 uniform, but smaller limbs than you would have had at the next node. If you have a runty side it's not worth it.
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And the 'almost FIM' topping. If you ever break down a plant after harvest, even the hollow stems are not hollow at the nodes - like bamboo.
By topping above the next node there's won't be a hole straight down through the plant to the nodes you are keeping.
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