I don't have the mast rake measurements with me. The best way to measure so that differences in rigging lengths are taken into account would be to use the trapeze wire. Place the trapeze wire at the top of one of the transoms and then meaure a point on the front of the hull forward of the front beam. use this as a datum and then measure mast rake forward or aft of ths point. This would be the same for any boat of the same design.
I'll take some measurements this weekend.
As far as the boards are concerned I have tried with them down and up. Pretty much the same up or down. Ref the rudders in their cassettes there does not seem to be any adjustments. They are either up or down or am I missing something here?