I figured that out. A more optimal option would be either one with an equal radius, like some tanks, or one with 1 eccentric closer to the blade locking point. Now I'm trying to figure out what angles are optimal. Tony Bose shared his drawing with people on the forum. Pay attention to the angles. Surely there must be an explanation for this from a mechanical point of view. I'll have to visit an old friend, he used to design very complex mechanisms with gears, maybe he'll suggest something