The pathway to sciences and invention begins with imagination/belief as does the skills required to attain such. So too does music and our accomplishment on this brass "thingy" in our hands. Otherwise, the "bell ringer" analysis is dependent on the variations of the crafts persons' hammering of the bell flare and I'm sure the same crafts person does not do this exactly the same way in sequence one instrument to another. Too, the other processes of finishing an instrument are laden with such variables. Additionally, consider the tech's restoration of bell damage of which we may no nothing about its effect on bell resonance or even if such exists especially among the pre-owned vintage "eye candy". Thereby, my opinion of such efforts is a nonsensical waste of time ... just as is this response of mine is for me, as may also be for you to read.