You going to have enough height for those tall bitches? That's some impressive stretch for a 400w considering the time frame and it ain't over yet.
I plan on running em same style as you,,4 main colas.
height should be no problem(they could grow min 1m more).
space will be a problem when i put my 4 malawi to em
bt 22 was tipped before flip(~5d) and she is smaller than the other. if yield is affected i can tell in dec