As the plants were trained and became much wider than the pots, I made frames at pot level with cross members that followed the lines of the main branches. This way I could tie down the ends of the branches without pulling them back towards the pot edges, thus keeping the branches nice and level and helping me to keep a level canopy to make good use of the light. With the C47 not being topped, and then LST'd at a later time, I made a frame around the outside of the cross members so that I could direct the lower branches to where I wanted them and get a better canopy. I wanted to have all four plants nice and level before switching to 12/12.
I use liquid seaweed as a tonic throughout the grow and it isn't in the dropdown menu for nutrients on here. So I'll mention that it is Shropshire seaweed and I feed at 2ml/L quite often throughout the grow. Mainly as a stress prevention after potting on and to get the microherd working in the compost.