Hey T, I'll second what Reggs said, wicked vid and those colossus are getting beautiful and thick. Actually they all are. That BS will thicken up, I've seen a similar strain here before and it thickened up A LOT at the end! LOL about upskirt root action too hahaha. awesome!
As for mother room, if you're only vegging with T5's then what you want to build should be fine. What you could do is slowly train the mother/s to grow sideways like a vine. I've grown plants along the side of a main road and no one had any idea until the buds were done lol. If you vine them out you then have a shit load more room to play with.
You can definitely take clones still too, as Reggs said, will just take longer to root but when they do they will grow real nice. I had an old mate who cloned a 4 week bud and vegged for 1 week and reflowered it, well it turned into one thick 3oz bud by the end that stood about 2ft tall. It was wicked to see. So yeah by all means still take some clones man
Wicked vid again man and thanks heaps for letting me be a part of it
Lookin real good.