Saw this on the tapedoff.com blog and thought this looks like it would work. Not sure how the fins are glassed into the bottom and what construction the fins are made out of.
The other question who is Frank?
http://1.bp.blogspot.com/-YR_7509wG-0/T1j4blq4oDI/AAAAAAAAMks/w3Qs3P54dWQ/s1600/photo-729928.JPG
Tomo is in the pic too. Another guy trying different things.