I added an anchor roller to the bow of both of my first 2 SIBs. Eliminates chaffing and damage to the tubes. I also placed swim noodles under the floor to fill the entire space. That significantly reduced volume space for water and any sloshing that would occur while under way. It also forced water to the rear of the SIB and out the drain hole. It also increased floatation. If my inflatable keel ever got a hole in it or lost air, I would still keep the "V" form and it would handle well to get back to the dock. Lastly, I rigged up a bilge pump to help pump out the water from under the floor.
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