Thank you so much, George.  I read the thread you referenced - very helpful for metal lip design.  One question from the below quote:
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					Originally Posted by  numbskull
					 
				 
				If you want a swimmer to work at a crawl, use a low slot lip and weight it to sit deeper in the water... 
			
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 In your opinion -- for this particular design -- do you think it's better to use additional lead or a denser wood to have it sit deeper in the surface film?