An assembly for precise positioning of a stamping tool, such as a photopolymer stamp. The assembly having a flat base of preferably a square shape. A platform of a predetermined height runs along the periphery of the flat base. A grid film removably adhered to the top surface of the flat base. Four alignment tabs can be provided on the four corners of the platform. A flip plate dimensioned to fit over the platform, such as corners of the flip plate juxtapose to the alignment tabs. A portion of the flip plate extends sidewards from the periphery of the platform, such as the flip plate can be lifted. The clear flip plate having radial lines that extend from the center to the periphery of the flip plate.