Have you main lined a plant before, and if so was the juice worth the squeeze? I've thought about trying this but I keep coming to the same (possibly wrong) conclusion; The benefits don't seem to outweigh the drawbacks. No doubt you will get a nice percentage of primo tops to harvest, but the extra time spent topping, training, topping, training adds a substantial amount on to the veg time. In my perpetual garden I think I end up further ahead just growing the plants out au naturale.
Disclaimer: I do not want to derail the thread or start an argument. Just curious.