Essentially Main-lining is an aggressive topping technique that will get you main tops of pretty even weight, potency, and just about everything else. I like the tech alot, and highly recommend it. You can search the term or you can look for Nugbuckets the guy who kind of perfected it, and set it all on paper so to speak. Real nice guy. Now the C.B.D. and T.H.C. is kind of difficult to an extent. cbd will not make you feel narcoticly sedated, but has analgesic effects like pain relief, and anti-inflammatory relief. T.H.C. is more commonly known as the narcotic, and will make you feel tired in high amounts, and can also be psychedelic in high amounts. I've read that cbd can actually work against that effect, and leaves you pretty clear headed, but really happy, and content. Depending on the amounts of other cannabanoids present it will do different things in a way, but it's usually more of a clear minded analgesic with some buzz to it, but not much. I'm not sure about cbd degredation, but I'm sure it's close to thc in the fact that you want to get those trichs when they're milky, and not after they turn amber. Keep an eye out as your grow is looking really nice so far. Peace and Love.