Throwout bearing self aligning or standard

formula, we're asking for the same reason, :) I saw the website and was like, is it REALLY worth the $20 or is it some snow job to get more money? OR is this some new way of doing things that is supposed to last way longer or make your waffles perfectly golden brown ???
After doing some searching I found some patent info on the web but it's like reading a mortgage loan doc. It appears that there is some sort of tapered...oh well just look....
http://commons.wikimedia.org/wiki/Image:Self-aligning-roller-thrust-bearing_din728_ex.png