A few years ago I was having a small problem with my Odyssey amp. I had emailed Klaus a couple of times but had no response. I decided to call him (in the evening, his time) and eventually caught him in his lab. I described the problem and, after a brief pause, he said, "Oh, Bill. Yes, of course" He remembered me, my correspondence, and best of all, we were able to work through the problem. Klaus is one of the great guys in this industry. You may need to be persistent but he will take care of any legitimate problem. Just keep trying until you reach him.
Bill O.