The craft returned to the water after re-fitting the keel with a foam insert throughout. Unladen it provides a surplus of buoyancy that I've never liked the look of, it seemingly dead in the water.
This is solved however by adding a 2.50 kilo battery-pack that sets the waterline about level with the underside of the deck.
The answer going forward tho' is to provide for a keel that can be flooded to a variable extent in order to suit the battery-pack of choice, which will be essential for the POC as I want to run with the lightest pack and so flood the keel to suit the waterline that appears here on the right.
An advantage of the design is that this dead weight of ballast will be released once on the plane, whereupon water in the keel will simply drain away; sustaining the claim of this outline to be the most efficient high-speed craft ever, ever, ever (no backsies).
