You fill the net 50-75% in veg and then flip to flower and weave it during the stretch. If its done right the buds grow up, away from the stem, rather than along it, and you can fill almost every square inch of canopy with nothing but big colas.
If you can control canopy height through other methods go for it. I've used craft wire to tie branches down, butterfly clips, zip ties. After letting a plant grow too tall, I went as far as taking hand held electric grass trimmers and just cutting it down to the height I wanted, then flowered it. That was an even canopy,lol.