I built a rudder mount on my Guillemot,out of 5 layers of 3mm marine ply.It is a short skeg or fin extending aft,and I put a Perception rudder on it .I much prefer the rudder to no rudder(sorry Nick),and it looks like it belongs on the hull .Its(the skegs) bottom edge just touches the water when she is loaded.I epoxied it on ,and used 2 layers of 6 oz glass per side,after fairing it in with cabosil thickened epoxy.Sorry I can't transmit a picture
> I'm in the progress of building a "guillemot", is it advisable
> to prepare for a rudder on this design? Or is that just to ruin something
> that has reached completion? Unfortunately I haven't had the opportunity
> to try this design.

> I recently stumbled across a product that looked just right for a previous
> posting about venting a closed compartment(I have searched the archive but
> is unable to find it again :( It is a membrane-ventilator from Gore called
> Gore-polyvent/PG7, that is used to ventilate electronics enclosures, it
> can withstand an outside water pressure of 0.6 bar. And when not under
> pressure ventilate vaporized water from the inside. Cost is 61 SKR about 8
> US.