Day 22 - Did some LST eventually, it looked so easy I wanted to try it. A few pistils showed up on the left plant, too.
Day 23 - Watered them with around 500ml each, no nutrients yet, until runoff. Obviously the left plant didn't like it and now it's drooping more than ever... The right one is still healthy. I'll be more careful next time.
Day 24 - The left one has recovered from drooping. Both growing well, the right one is already rebelling to LST, I'll bend it again as soon as possible. I'll also add a few nutrients next time I water them since I can spot some light yellowing.
Day 25 - All good
Day 26 - All good, the left one seems to already have lost the main cola, with a different one going higher.
Day 27 - All good, watered both of them with around 500ml of water and 2ml/l of nutrients. The left one would have liked a bit less water.
Day 28 - All good, trained both of them a bit after the picture. Interesting how the left one seems to already have several "main" colas while the right one is sticking to one, maybe two.