Cheap Hub Stands?
 

Hello everyone, I recently learned about hub stands and so many people say that it's a great thing for racers (you can adjust your car's geometry on track or garage). But they are so expensive and I looked up for cheaper ones. I found these:
http://npparts.com/index.php?id_product=38&controller=product&id_lang=1&search_query=hub&re sults=1

What do you think about it? Have you ever used them? Are these ones good?