First EVER grow

So, I've been growing hydroponic/aeroponically for 10 years now. I've grown everything you could imagine in water/air, but I never took a stab at growing my own weed. Well, 2 and a half weeks into flowering and here I am. This Blue Dream plant is growing in a simple 2x airstone DWC with daily top offs (playing that NPK like a fiddle) I have 3 extra deep red lights (6 led 12w), 1 infrared light (6 led 19w), 2x 4ft UVA light bars (22w) and for the main light I'm using the MH ts3000 450watt 4×4 FSGL. In a 4×4 tent with ac infinity cloud line 4 exhaust. I topped my plant only one time, now, it has 4 clear tops, each at 6foot 6 inches tall, and still growing…. collas are building EVERYWHERE which is exciting.
She is much larger than I expected I will say… She has outgrown the 4×4 tent on every side. I removed the top of the tent and mounted the light to my ceiling. The main colas were getting 78-80 k lux, and still growing. I am trying to keep the tops between 70-75k lux.
My question is, how much dry weight can I expect? My friend who grows indoors with soil said I should expect about 2.5 oz.
TBH this plant seems to be MUCH larger and much more bud filled than anything he's grown. So I wanted to ask you guys what you think?