I thought it would be useful for students and also for viewers of a video to see markings on a long tai chi ruler. So I put some fluorescent tape in yellow, green and pink on the long ruler. None – not one – of the students liked the tape. I am not sure if it was a color problem, or they did not like the feel of the tape (as opposed to the wood) or if the tape hampered sliding one’s hands on the wood. In any case, off came the tape pieces.