Just updated the chess piece models to be built wih a solid base and an embeded magnet. They are sized to be 1.25" at the base as well.
For my chess board, I updated the bases to have a small relief on the bottom to allow some room to sit perfectly flat on the chess board since the center of the squares were slightly raised due tothe surface finish. The relief is minor, but helpful. Both options are available to use and works well with the flat bottom version to use somthing like octogram spiral for the bottom layer.
The author remixed this model.
I updated the base of these pieces so that I could print the base solid and embed a 6x2mm neodymium magnet for a custom chess board design. The Knight was used from a different remix as well. They are sized to be 1.25" at the base as well.