I think when you are looking at spiders you need to ask the right questions about it. From what I have seen the wobbling/spining can be reduced by breeding quality non wobbling/spinning animals. It all comes back to knowing who you get an animal from and getting quality snakes/spiders.

When I buy a spider I look for high white, reduced pattern and little or no signs of wobble(I wouldnt even look at anything spinning, big difference)). I also will pay more than the best price on KS to get what I want. Buy quality from reputable people and you are fine.
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Spiders rock