Dark chess board piece

I altered the hollows underneath the dark chessboard piece/s for a looser fit of the tabs from the light chessboard (tabbed) pieces. This allows the puzzle/chess board to go together without tension/flex across the board. Someone else could do a better job. I am a 3D editing noob, so the hollows may not be exactly the same size on each of the 4 sides (I did my best free-hand as my skills are absolutely beginner level). Thanks to 'Parthenogenesis' for the original files; It allowed me to make my 12-year-old son a custom chessboard for one of his Christmas presents & I appreciate your design.