Two well-known tubists, whose opinions I trust, tried the CC and F at ITEC 2012. They said they recognized the HB lineage in both. They liked the CC, but did not seem real excited about it. But the F got them excited! It was a similar experience at ITEC 2014 - people really like the F. We'll see where Adams goes with the CC. They certainly have a good starting point with the HB tooling. It may be something regarding just minor build-points that need to be tweaked, or it could be the choice of metal/weight to get people excited about the CC. I'm not nearly enough of a tubist to advise them on this, but I'm sure they will listen to players who test them and adjust accordingly.