I appreciate how detailed your journal is! Thank you for that! It makes things soo much easier to read through and catch up on! You can read up on "lollipoping" your plants. That will get rid of all popcorn buds. But at 71 days, Id say it way to late to start that process. A couple of other options are to either use the popcorn buds for hash.. Or you can harvest in stages when the plant is ready to chop. Meaning, that when you are ready to harvest, chop off all the main colas and mature buds.. Then leave the popcorn buds on the plant and under the lights for another 2 weeks or so and let the "popcorn" buds fully mature. They are only popcorn buds because they are soo low and arent getting enough light. I throw any immature buds into my hash/trim pile.