Hi I ran across this the other day , balancemasters.com they make big claims about how this set up will balance your wheels on your truck , car or motorcycle , and they also have a set up for flywheels , it all seems too good to be true , but also would be nice if it worked for Hot rods, Just wondering how safe it if having that much mercury around if you have a crash or a fire ! anyone have more "real world" experiances ? google search finds mostly links back to the company