Don't worry, you have plenty of time to defoliate a bit more if you want. It's good to be conservative the first time you do it. Once you flip, the plants will grow quickly for 3 weeks or so, and during that time some of the bud sites will grow much faster than others, creating an uneven canopy. You can supercrop any of those fast growing branches, just crush the stem and bend it over so it's even at the canopy again. If you don't secure the branch, it will bend back up in a day or two, but you can keep supercropping as much as you want without anything bad happening-so long as you are careful and don't break the branch off. I do it to all of my branches because it creates extremely strong, thick branches that don't need much (if any) support. Be sure to remove the bud sites/branches that can't keep up with the canopy during stretch-people call those the "suckers." Remove leaves that are sitting directly on top of each other, big fan leaves that are covering bud sites at the canopy level, and also leaves that aren't getting any light inside of the canopy. This will reduce the RH inside the canopy and increase air flow. The plants in my 3x3 grow journal in my sig are a little bit further along than yours, but I just went through and did a bunch of defoliation so you can check it out if you want to see what it looks like. I'm not sure if you flipped yours already but I'd do it soon if not, some plants stretch like crazy so you might need to boost the shorter one up at some point to keep them even-which is important so they both get ample light. Good luck!!