Gorilla Glue FastBuds Day 50

Any guesses on how much longer? I've been planning on a 77 day grow.

Any guesses on yield?

Thanks!

2x4 space, 5 gal tubs, mars sp 250

GH flora series with Calimagic and Floralicious Plus, Diamond Nectar, Liquid KoolBloom

PH 6

Temp 75
Humidity 60