I should have been more clear. Too much catalyst dissipates with an acrid, almost vomit type odor, often accompanied by a pinkish color shift and/or haze. This is a different smell than the normal outgassing of formaldehyde. In my opinion, companies that use a diluted catalyst are just trying to sell more product. A gallon of catalyst at 3% lasts a lot longer than a gallon at 10%. 3% ratios are not difficult to measure with reasonable accuracy.
Crew weight. There is a wide range of crew weights that is competitive in the Viper 640. The average of all crew weights at the 2015 North Americans: 550 lbs. Crew weights ranged from a low of 490 (#10) to a high of 650 lbs.
That is trailer weight and tongue weight. Trailer weight is the total weight of the item you're towing. It's called trailer weight regardless of what it actually is. A 2000lb boat on an 800lb boat trailer is still 2800lb of trailer weight.Tongue weight is how much weight is pushing down on your hitch.our best bet is to go to a business that sells and installs hitches and or trailers. Tell them what you want to tow and ask them what kind of a hitch you'll need. A company that services holiday trailers and RV's would be a good place to start. The higher the hitch class, the more capacity it has and the bulkier it is.