First AFN post, new to indoor grows and auto's however over 40 years of outdoor cannabis cultivation experience. I too think your killing it with the 1st grow after a 16 years hiatus.
I'm at day 26 with my first ever indoor auto grow and my girls while healthy have not experienced the growth you have and I still don't think the next 11 days will get me anywhere close to where you are. In a 3'x3' tent I'm growing one each of NYC Diesel, Train Wreck, Candy Cane, Lambs Breath, Early Miss and White Widow under a California Light Works Solar System 550, 24" over the canopy in 3 gallon pots with Fox Farms Ocean Forest.
I have great intake and exhaust circulation with two 6" AC Infinity duct fans where I can regulate the tent pressure with the variable speed controllers. My average daily temperature is 75.2 and the average daily RH is 35.4% which is a little cool which is probably a contributing factor as to why my crop is behind yours at this point.
I've only given them well water which consistently pH's at 6.0 and yesterday gave them their first nutes, 15ml. of Fox Farms Big Bloom in 1 gallon of water. I'm trying to simplify my grow routine as much as possible and use common sense coupled with strong daily journaling to have a repeatable process that I can make small re calibrations to with future grows.
Keep up the good work and I look forward to your future posts!
BTW - Looks like you added a PVC tubing structure to your tent, is that a trellis system in the making?