Bridging of fabric will add a lot of weight in resin. Core used where not needed will also suck it up. If no bridging and proper baggin bragging 40/60 is easily obtainable. My carbon decks weigh almost 20 lbs so 35 for glass is respectable imo. 2 gallons of resin is about right for a glass tank.
25 pounds of resin in a 33 pound deck makes a 24/76 glass/resin ratio. At that point infusing no longer makes sense and you'd be better off hand laying. 35 pounds is a great weight for a glass deck. What I'm saying is that neither his layup numbers nor his deck numbers add up in any way. 100oz layup is not a "tank" layup at all. That's a lightweight layup. 80oz is even lighter. Adding more resin doesn't turn a lightweight hull into a surf hull. It just doesn't.
My assumption was that he had miscalculated his layup weight. These calculations are important...I don't understand how you could even begin an infusion without knowing exactly what all these numbers are. How do you measure out the correct amount of resin if you don't know exactly how much resin it will take to saturate the reinforcement you are using? Just guess? These are easily calculated numbers.
100 pounds makes sense for a surf hull and so does 2.5 gallons per deck for a surf hull.
80-100oz layup makes perfect sense for a lightweight hull and 33-34 pound decks also makes perfect sense for an 80-100oz layup.
Mixing these numbers and leaving a mystery 30 pounds up in the air leaves me baffled.