Here is my Monster Go cube made into a cross practice cube by replacing 4 corners with extra black ones from a second cube. I'm sure many have done this by removing stickers, but this s stickerless, which I like and is a reasonably good Gan made cube, non magnetic, but that's OK.
2nd pic is the 'UT' cube is based on.
2nd pic is the 'UT' cube is based on.