The “math mode” Is cool, but the Max sounds better for a mix of let’ letters and numbers. I saw a one-piece board on here with a central trackball that looked almost perfect but I really like the idea of a split because I’ve got wide shoulders so the angle of most ergo boards is still not enough to make them perfectly comfortable for me. A split with a trackball on one side and a scroll wheel on the other? That could be perfection.