Just as an FYI - rarely does anyone breed spider siblings together - in fact, being classified (thus far) as a dominant trait, it's one of the most out-crossed morphs. To make more spiders, you only need to breed to normals.
Just as a low white pied can throw high white and vice versa, spiders with very minimal wobblers can throw trainwrecks, and trainwrecks can throw low wobblers.