” the octave harmonic (which is the most important overtone) “
…. this statement sums up everything. My ears hear the octave harmonics more than anything else on a harp.
Also, Kathy, I think saying this may make sense, that tuning the lower string slightly flat in relation to the octave overtone created with the string an octave above the string you are tuning.
OK… it’s my day off and I’m looking forward to memorizing some new music….. y’all have a great day….