I haven't heard of pins wobbling. Mine definitely doesn't. My spider girl doesn't have any noticeable wobble either though. Pretty much all spiders will wobble to some degree. Some will be barely noticeable and only during feeding or when stressed, other spiders will corkscrew so badly that they seem to have no motor control whatsoever.... As long as the wobble isn't having a negative impact on the animal, I don't have a problem with it. I hesitated to get into spiders for a long time for the same reason, but now I'm glad I did...