Just found this post by @Greg_F which is the quiver I have in mind, kind of.
This brings me back to my original doubts. What size sinker would you recommend? I have zero experience with sinkers. I weigh 78 kg. Im considering 55 litre board. Bigger would be too close to my bodyweight and probably be too floaty. Smaller would be too difficult for winging. Any thoughts? @OmarFoilCol allow me please to tag you.