MGC 4x4 Core Magnets

Core magnets have been coming out on newer 3x3 puzzles and there have even been kits for existing 3x3 puzzles. However, the only other puzzles to get this treatment have been Skewb, Pyraminx, and 2x2, all from GAN. I think that the 4x4 is a perfect candidate for this because it adds stability and improves consistency, giving a better solving experience. So far the most I've seen is gluing magnets directly in. I designed this for a more effective mounting method.

Update: Ball core added for improved performance and reduced complexity.

Supports are recommended but not necessary.