Now that I know that my DD has visual motor integration issues (from Beery VMI) and "undiagnosed disgraphia", if I needed to have a WISC score for her to get her into a certain program, I would definitely push for substitutions on both coding and block design (which requires manipulation of small blocks under a time constraint). In her case, her WISC scores were such that a GAI could not even be calculated. In any event, some of our programs locally only accept FSIQ.