Fairly new to pest/herbicide apps. Most of my lawns are 1/4 to 1/2 an acre...however a few are well over that and backpack sprayer can get heavy fast. The Synergy is only a couple gallons and gregson clark inserts convert/replace a perfectly good spreaders capabilities. I'd have to go buy another spreader? Just wondering what you guys thought... Here are its specs: Electric 12 volt push sprayer, 15-6.50x6 rear tires, zero turn radius with 360 degree front tire, 8 gallon poly tank, 80 inch spray width, foldable booms, turbo teejet air induction tips, extremely low drift, pressure gauge, bypass valve, deep cycle wheel chair battery, 12v battery charger included, Shurflo pump, edge curtain optional. Calibration: 16 gpa, 1/2 acre / tank at 20 psi, 2.5 mph at comfortable walking speed.