yea good for you. I have 9915'S, not 9515'S. The 99's more more than just a different cap and cone. If you know anything about DD you know there is a reason they made the 99's and 95's, and why the 99's are worth more. They can handle more of a beating. Most of it is the cone, but they were manufactured to handle more power than a 95. You can go get a fake 99 by putting on a carbon fiber dustcap and cone on a 95 for a little less, or get the real thing.