It’s a big lovely plant nice job. If I were to grow that exact same plant the following year these are the things I would change.
1: I would start it in a smaller pot and do more incremental re-pot so it doesn’t grow so damn big so fast. (If you did this all ready then awesome).
2: I would try to start it maybe a little later in the season so it doesn’t grow so tall so fast. I have noticed the last four or five seasons I’ve been putting my plants out just a little later so I don’t have to top them quite so much during the vegetative stage.
3: And lastly I would definitely top it around 12 inches so that big girl bushes out and doesn’t grow into it such a big Christmas tree. One (or 3) big top bud is always more likely to get mold than an even top bunch of bush like branches. I would’ve tried to push a plant that tall out into six or 12 lead branches. If I top it and it only gives me three I will top it again in the next week. And doing that lower top while the plant is younger will keep that whole bush from getting quite so tall and needing such a big pot in the end. I also like currdogd’s suggestion of switching to a fabric pot. One of the best advantages of the fabric pots is you can get away with the smaller pot. With the air pruning of the roots they don’t root bind so tight and need to be upsized so frequently as an a classic solid pot. Otherwise it’s a lovely plant. Just a real big motherfucker from somebody who likes to grow them tall myself.
If you do repot it again I may humbly suggest to still top the 3 lead shoots. Just a node shave down, don’t hack it. Otherwise after a good re-pot it may just start stretching again with all the root space. If you cut the three leader branches tops its more likely to settle down and switch to the flowering. Basically you want to traumatize those tops so they’ll stop stretching. Make it switch gears and start flowering. This has worked well for me and stretch monsters that should’ve approached flowering for me in the past.