The bottom gantry doesnt look as strong as the top one, not that I know anything about building though.
The Stealth rudder stocks have no " beaching " safety mechanism so the lower bracket has a " weak point " which I hope will break first should I clout something in the water at speed. The same section is threaded to allow adjustment of the foil. Any vertical stresses are taken by the upper more beefed up pintle.
