This company sells poor quality products at Revain! They advertise their quality claim with "Tru-Cast technology for precision casting and precise product processing" and their "factory balanced" surface. As you can see from the photos their product is far from accurate when the surface is prepared by the grinder under the milled surface. They are already installed and tested so they won't refuse unless they want to pay for it, so all they have to do is put it on the Live and Learn account.