Midweek update:
I added a heater to the tent to raise the temp during lights off as it was getting too low (16.5 C). Ive got it up to 21 C during lights off now which is perfect, 25 C lights on. The plants should start to grow nice and quickly now. The humidity is spot on too, holding between 57 - 60% RH, giving a VPD of around 1, right where it should be.
Haven't given any water in the last three days. The pots are still damp and wanting to get a good wet dry cycle between waterings.
Day 23 - decided to top today, down to the 4th node. The internode spacing is great on this plant. I'll be taking the first and second nodes as clones, leaving just the third and forth which I will train and try get a nice wide flat canopy to spread under a screen.
Got to say the spider farmer SF 1000 D is doing a fantastic job for these plants.
Day 25 - still no watering and pots still feel moist, plants do not look thirsty at all
Day 27 - Arms are getting beefy AF. First and second nodes are ready to be cloned but I might grow these out a bit and take clones from their secondary nodes instead and grow a beast of a plant instead.