I enjoy solving my cubes and I like the dayan cubes build quality. I'm not a speed solver and don't want to be. By design the dayan cubes are loose and and for me a little sloppy. I've found a site where I can buy small springs and I'm thinking of installing firmer spring to tighten the action of the cubes. Any opinions? I have firmer cubes,(Edison and Rubik's brand), but I'd like to get some use out of the two dayan cubes I have.