wow. I know the internet has some very serious communication limitations; but, you have so completely missed the point I was trying to make that it both pains and saddens. I apologize for that. I purely referred to Billies Bounce because it is a well known standard. No obsession there. Could have been any other bop tune; and my ONLY reason for referring to playing the head is that accurate large position shifts are needed as opposed to smaller relative shifts while walking. And to review the context, again, the claim of a multitude of posters was that a learning player should use NO visual marks and play purely by ear on the fretless electric bass guitar. Not the upright bass. I strongly dissent from that opinion. I raised the point of playing a bop head as an example of using large position shifts. That was the only intent. I already have 5 grandchildren and am too old to be interested in measuring contests. My main concern these days is for the kids. As for the Dig Ups; which I suppose you are referencing, that is not my only gig. Hint: I still play orchestra and I too studied with exceptional upright players. It’s a big world. The internet makes it a little smaller. Just a little. But that can be deceiving.