I know everyone talks about the X12 http://times12.com/wrench.htm
so what's the advantage over something like this one from northern?
http://www.northerntool.com/webapp/w...5001_200315001
or over the Mountz products?
http://www.etorque.com/html/hand_multipliers.htm
or more like these
http://www.etorque.com/html/mtmtorquemultiplier.htm
Another question, if you have one, have you ever used it for anything other than your coach wheels?
What else did you need to make it functional (e.g., extensions, sockets, reaction feet, etc.)?