That's impressive! My last grow with the superbox just yielded 1oz so that's why I was so worried but I will take your advice and pop 2-3 [emoji4]
I got to admit it was a bit nerve wracking letting my last one grow upward pretty much unrestrained in my 59" tent but I'm happy to do it again now as it is much easier than scrogging/sogging! I dream of a tent your tall so you should do fine with 2-3 plants and little bit of LST.