Dump all peeled and sliced kohlrabi pieces in a large bowl and sprinkle generously with salt, tossing in bowl to ensure that all pieces are coated. Set aside for 30-45 minutes to allow the salt to draw water out of the vegetable. In a separate, smaller bowl, mix all ingredients from Group B, beginning with the radishes, turnips, onion, scallions, garlic and parsley and lemon/lime juice and the salt. Toss to ensure the salt gets on everything, then add the pepper flakes and black pepper and toss some more. Set to the side to let the juices mix. After 30-45 minutes, a significant amount of water will have been drawn from the kohlrabi slices by the salt. Drain all of this off and lightly rinse excess salt off the vegetable and put back in the large bowl. Now mix the spicy mixture of Group B ingredients (with juice) in, tossing until thoroughly encorporated. Move mixture from bowl to a clean and dry airtight container, cover and put in a cool, dark place for a minimum of 2 weeks. The salt will continue to draw water from the kimchi until the veggies are completely covered in their own fluid.