Spicy California Rolls

Name: Spicy California Rolls
Ingredients: 3 cups sushi rice; 1/2 teaspoon salt; 1/3 cup rice wine vinegar; 2 tablespoons sugar; 1 avocado, halved lengthwise, pitted, peeled and cut lengthwise into 1/8-inch slices; 3 tablespoons fresh lemon juice; (6) 8 x 7-inch nori sheets; 3 cups prepared sushi rice; 1 tablespoon wasabi powder, combined with 1 tablespoon cold water, or wasabi paste; 2 frozen Alaskan king crab legs, thawed, shelled and thick sections halved lengthwise, or 3/4 pound frozen Alaskan king crab meat, thawed and drained; 1 seedless cucumber, halved lengthwise and cut lengthwise into 1/8-inch slices