First little grow

After growing slowly at first after the re-pot, the plants seem to growing really well again. I have topped the plants after the fifth node and have pegged some of the branches out horizontally. I went a little too hard on one and cracked/split one of the two main colas. Shit !. It is broken about halfway through the stalk, just after it branches from the top of the main stem. Bummer. I didn't even notice at first. the leaves still seem to be healthy. I will support it and hope it will heal. I need to build a scrog frame and string it up. Also need to decide how high to place the net above the top of the pots. I saw varying distances on various web sites. I think I will place about 8 inches (20cm). My limited height is a big factor here. I would like to leave myself some wiggle room in case the plants take a big stretch when they go into flower. As I'm such a novice I have no experience of how big these things will get. Have built a light frame with yet more scrap(but clean) timber I had going to waste. I have strung it with cotton parcel twine in a 4inch (10cm) grid. Screwed some wooden brackets to the corners of the cabinet and dropped the frame in. It is just at the top of the plants, so I am removing my LST stakes, and letting the plant grow through the net, so I can tie it down as it grows. The plants are really getting bigger than I had anticipated. Next grow will be a single plant in a 30l (6.5 gallon) grow pot, with the top rolled down a couple of inches.