On the upside, it may be easier to add keys to the ring, since you can grip it by the fixed key while you're forcing the new key through the tracks. On the dow

On the upside, it may be easier to add keys to the ring, since you can grip it by the fixed key while you're forcing the new key through the tracks. On the downside, how do you remove a key from the ring without the other keys getting in the way? Wouldn't the fixed key get in the way of being able to slide other keys aside? Is there a topologist in the house?