Thanks guys, I am using dual 2" central vac tubing. that is 50mm openings and i run 48mm carbs I think that is enough to not choke the motor. if i get out on the creek today i can test my old hood and this hood to see if my motor feels restricted with just the dual 2". the hood in the pic weighed in at 4 lbs but I added two alum channel beams held with rivits. approx 1 lbs for my tubing, and another 1lbs for my ball valve and nose handle. so approx 12lb weight reduction on my ski, that should bring it to 268lbs. I think i can loose 6lbs from my battery when i need to buy a new one. After that the only way I see shedding lbs is to buy different parts that are slightly lighter than what i have now. I won't get the battery until this one get tired, which being its 4th season, could be soon.