Fat Banana Automatic Grow

I have been continually defoliating the lower canopies, and small bud stems. I am only using plain water ph'd to 6.2-6.5. This is because I top dressed with fairly heavy nutrients last week, and it will be kicking in right now. So, I want to avoid using any fertilizer until the plants have processed the top dress to avoid nutrient overload/lockout. Bud sites on the Royal Critical and FBP2 are coming in nicely, bushy and tightly clustered. The FBP1 and FBP3 are very tall, and have grown past the light, they're looking fairly sparse. I don't know how to rectify that at this stage, so I'm just going to let them be. The plants are becoming very thirsty, so I need to keep a close eye on the watering. Hopefully we're closing in on harvest time! I'm getting impatient and it's taking longer than anticipated. I've got so much going on in life right now, so I'll be very glad to get these finished.