She looks beautifully built, and a gold mine of innovative ideas.
And I just love that look of pride and satisfaction in the second photo!
Look forward to the trials.
One thing puzzled me - I too am looking at twin rudders with lifting blades, but resiled from end plates on the blades. it strikes me that with twin rudders end plates may not be necessary, but the main issue for me was - does this mean the rudders have only two positions: fully up and fully down?
Good luck for launching day and future adventures.
PS I meant to add: I think you have done well with the tabernacle, just looking at those photographs from a previous post.
You have avoided any fastenings through the mast at that sensitive point - and avoided that horror of horrors, a pin through the mast. Your arrangement might look a litle frail, but it is not. You have realised that the hinge arrangement is used only for those few seconds when the mast is being raised or lowered, the rest of the time it is out of the picture, structurally. If an aluminium mast is to rotate on that axis (the top of the tabernmacle) something like that is the way to do it. The hinge pin should be mounted on the tabernacle, as you have done it, not on or through the mast.
There is a possibility too, that the pin could extend each side of the tabernacle (a bit like a bollard) and the clamp could be just a temporary square lashing. I haven't seen it done, but can't see why not.
I hope you will post more photos which will stimulate more comments from other readers.