I just came across this drive system: http://lamemarine.com/searider/index.html The concept sounds interesting but a lot of external hardware and maybe complex internals. Curious if anyone knows this system.
We had a thread long ago that included this. I think Levi designed it? Found it. Not a lot of detail but some comments that it was not so hot after all. Past half way thru ; https://www.yachtforums.com/threads/hull-vane.20338/page-2 However, I'm still interested in a cheap bolt on hull-vain for my fat-asped Bert..