Peel your cucumbers - or you can leave the peel on if you want - slice cucumber into fairly thin slices. Place into a colander and sprinkle with coarse sea salt. Set on something to catch the water that drains off, and set aside.  Mix together sour cream, 2 teaspoons finely chopped onion, 2 teaspoons fresh chopped dill, vinegar, and sugar. Cover and place in fridge. Let cucumbers drain and dressing chill for at least an hour, up to 2 hours.