Yes, I've made it.
You thinly slice the cabbage, and then pound salt into it in a crock, a layer at a time. I used a mortar and pestle type "pounder". When you have enough, put a plate over it with a weight so that it's pressed down. Put it someplace coolish, but not cold. Wait. Skim off the scum every few days, and smash it back down and weight it again. It should be ready in 2-3 weeks.