I found last night that I have made some unexpected modifications to the plywood walrus hull that shortened it up by 8" DON'T LAUGH!!! My dad always said measure twice and cut once...whatever... stupid cumulative error when placing forms.

Anyway,

I am wanting to recalculate the cockpit placment and understand where the paddler needs to be in relation to the CB. What I need help with is how to find where the CB is on a hull that is finished. Is it close enough if I just find the balance point by setting the hull on a dowel??

My unedumicated guess is that hull shape has a lot to do with it so balance point will not be enough.

Is there a quick and dirty way to derive this?

Thanks for your help.
Ben Staley