Does any of the machinists on the forum have a surface grinder? I recently bought a mold from Mi-hec and the sprue plate was not straight. Two of the cavities had .004" clearance between the mold and the sprue plate while the other two were tight. He sent me a new sprue plate that cured the problem. So I have the old one. I would like to have it ground and use it as a spare. Anyone have a grinder?