I would usually scrog, but I'm trying some new strains from seed. Since timing's tight, I'm not able to sex before flipping to 12/12, so scrogging's out. I'm giving your topping process a go, and pinched the plants last night. Given my space limits, this method seems like the simplest and least work intensive out there. I also like that the colas from four tops will be easier to trim than a bushy plant.
It was a bit of a scare at first removing all that vegetable matter, but the plants have already recovered after 8 hrs, and the boost in branching has already begun.
I'll post pics once they are well in flower. Thanks for keeping this thread going.