We had this issue with the Audis but it wasn't because of them topping out. It was actually the side load on the internal parts of the strut. I honestly don't remember the part that kept failing but after some research with Lee at Koni he was able to identify the exact issue. In the end we went with Bilstiens like most FWD VWs have around here in the north east. The Konis wouldn't last more than a few weekends and the Bilstiens lasted 2+ years. I will say that Koni was awesome and very helpful. If you haven't sent them directly to Koni and talked to them one on one then do so, they are (were a few years ago) very informative and helpful.

Stephen

On edit: I meant to mention that I don't think Bildon is doing anything anymore. A few friends of mine tried multiple times to contact them and to this day still have not heard back from anyone.