@Bolota great looking grow. Especially being your first. You want advice, I have some pointers for you buddy. Get some soft garden ties, or pipe cleaners for training. Supercropping is great but she will bounce back quick without being tied down. Personally, I would just pull her top down, slowly, and tie her to the side of the pot. Be sure to not strangle the stem, a loose wrap is perf. Once you've tied down the dominant cola, the next in line will fight cor dominance. Do the same to that cola. Spread her out, you have plenty of room but, restricted in hieght. Due to the inverse square law, you want as many tops as possible to be level. This will equal in higher yields, everytime. Mold those girls to your space. No need to have the plant smooched against the wall, when you have unused space.
Do you have an intake fan? I would pull that duct, flush to the tent wall, giving you more space.
That yellow coloring you saw was definitely nute burn. Very mild so, no worries. I look for that, to know I have fed just enough. Personally, I prefer to feed every water and adjust according to the response I observe.
All said...awesome job!!! Tag me, if I can help.
