SoG 2wk 4 tray nutrient life cycle??

Hello all. Interested in SoG 2 week cycle using all canna nutrients with no veg. Following Al B Fuct's system, these are the 2 week tray nutrient life cycles I came up with. I would use 4x4 trays, 50 gal res(for each tray), 5 inch netted pots and 1 1000hps for a pair of trays. My medium is half loose RW half hydroton. Can I get away with using smaller res for this SoG setup?*Also I've read a lot on people's different takes on flushing, any recommendations on flushing the second week on tray 4 before harvest? Or should I just use the boost and zym for full final 2 weeks?

Thanks truly in advance.

Tray nutrient values

#1
AB Vega=602ml
Rhizo=380ml
CannaZym=475
CannaBoost=500

#2
AB Flores=715ml
Rhizo=95
CannaZym=475
CannaBoost=500
*2nd week add 285ml PK

#3
AB Flores=555ml
Rhizo=95ml
CannaZym=475
CannaBoost=500

#4
CannaZym=500
CannaBoost=500