If special turns out to be another version (allele) of the same gene as the lesser/mojave/phantom/Vin Russo/latte white snake complex then it would not be possible to be both homozygous special and mojave based on there only being room for 2 copies of the same gene (one from each parent). It will be interesting to see if Tom's breedings disprove or support special being another mutant allele of the same gene as mojave.