Chris, like you and Johan, I, too, had a bump at the top of my incision. My surgeon assured me that it was "an artifact of the geometry of surgery". The good news is that it does not indicate a problem and it goes away in 3 to 6 months.
Oh, I see your valve is like mine and Johan's. Following up on a conversation I had with Johan, have you received your card from Edwards? If you have not received it, you may want to call them and register your valve yourself (Edwards Customer Service: 800-424-3278). Sometimes the Surgeon's office does it but sometimes not. Best to get it done now when the records are still fresh. Chris, I hope your recovery is going well; take care.
Larry