golf ball stencil 3d model

A 3D model of a custom golf ball marking stencil. The core shape is a hollow hemisphere dome with an open bottom, designed with an inner diameter of 43mm to fit snugly over a standard golf ball. The wall thickness of the dome should be approximately 2mm. At the top center of the dome, the capital letters 'HM' are entirely cut out through the shell to function as a stencil for a Sharpie. The letters should be in a bold, classic serif font. On the bottom edge of the dome, add two flat, semi-circular tabs protruding horizontally on exactly opposite sides to act as finger grips.