Stump shade ST7 Crown shade chromascope 6B-420 or 3L1.5 3D Vitapan Dentist wants the incisal 1/3 of tab used for entire crown shade. More translucency and less value. Does the ST7 stump shade match closer to the ND 2 stump shade? I only have LT ingots. Can this be done using a LT D2 ingot with some cut back and adding porcelain?