@gottagrowsometime - thee are only 2 sets of leaves at any growth node unless it's a tri-leaf mutation, bud. So, by tellin him to get 2-3 at each node you are ostensibly saying don't remove any. Also, a more mature plant will only have 1 leaf at each node once asymmetrical growth starts.
to clear that up:
light penetration should be achieved through not over-crowding the area. The sugars produced by photosynthesis are highly mobile. the reason the top growth gets the lion's share is not about where the light hits but about apical dominance. Again, there's a great article on cocoforcannabis that explains all of this for those that haven't taken many bio and chem classes in their lives -- there's simply too much knowledge out there for 1 person to have, so you have to rely on those that spend decades working in these areas, just as you do with a mechanic, but less motivation to lie for profit, lol.
Seriously, read all the guides and articles in dr photon's corner. you can avoid "bro-science" liek this and that 36 hours of darkness nonsense, lol.... or that flushing somehow dilutes what is in the plant, as if it has an excretion system, lol. it is a tool to fix a rootzone problem, but any buildup in plant takes time to work off the excess. it's not being "flushed" out because it can't without an excretion system to do it.
education and experience tells me this. the articles on cocoforcannabis orginate from the same knowledge base. you can see it play out the same on other similar flowering plants, it's beyond a debate, yet common perception is often wrong about this techinical detail and incredulous about it. I've even purpusely left leaves covering entire bud sites and those buds develop just as well as all other buds with similar apical dominance (mostly about vertical height on plant, but also the vascular tissue leading to it is a factor). Light penetration is good, but don't sacrifice canopy coverage, ever. the results of photosynthesis are trucked around the plant freeling. it is HIGHLY mobile. it's ever-present in the phloem all throughout the plant, realtive to teh rate at which it is produced, which is only reduced when you remove leaves, never increased. that would defy the laws of physics. It's be like thining a ball thrown by a pitcher can speed up after it left the pitcher's hand, despite no additional forces placed upon the ball, just magicall speeds up somewher betwee pitcher and catcher for no reason (ignoring wind)