I've already seen it said a dozen times on this and countless other forums by people with more knowledge about these animals and genetics in general, than I could ever hope to have so I'll say this. In short, you will not breed the defect out of the morph. It is attached to the spider gene.
This morph is one of the most OUT bred morphs there is, because of the awesome/beautiful combinations it produces. Those outb red combinations STILL contain the wobble. There is NO WAY to breed the wobble out. again, it is genetically attached to the spider morph no matter what you do.
The wobble is NO reason to stop breeding this animal to either produce more spiders or other genetic combinations because so far as I've seen and read in my research on these animals this "defect" is very rarely drastic enough to disable them from eating or living in general comfort.
I've got a spider, he wobbles. He doesn't corkscrew or have any tendency to turn himself upside down, etc.. but his wobble is super noticeable when he gets excited about feeding and he has only EVER missed the first strike once since I got him at 90 days old.