I would recommend topping the plant "HST" and then using LST on the remaining nodes that will develop from the topped site. It will take a bit of time but it will be easy.
I would also read up on how to LST and HST to get a better understanding of it. also look at jourals that use HST and LST to get a better understanding of it.
growdiaries.com/journal/how-to-do-low-stress-training-lst-on-cannabis-plants
growdiaries.com/journal/how-to-do-high-stress-training-hst-on-cannabis
You can see my HST and LST in this diary. its a bit long but if you scroll through the weeks you can see it coming together.
growdiaries.com/diaries/129773-grow-journal-by-m0use
Best Of Luck!
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