On the subject of bouyancy, take a look at the aft bouyancy tanks
on this "professionally" built one from england
. I didn't notice this until after mine were installed but the ones on this boat look bigger.
In fact they can be bigger than the design calls for while still allowing for nesting, however I believe they are designed as big as the designer
could make them while optimizing his use of the plywood
, something you refer to in the design business as how your parts
are "nested" in your sheet.
As it was I bought the extra sheet of plywood required for the sailing version then decided to use 3/4" thick material for the daggerboard and rudder
so would have had plenty of 1/4" material to build bigger aft tanks
. If only I could go back in time!
if I could I would have messed around with pieces of carboard to make a pattern for the biggest aft tanks that would fit.