I purchased a drum dial awhile back from the BB Store and have a question
in the instructions for it, it states it is calibrated at factory but to insure it is correctly calibrated in the instructions it recommends checking the calibrating by placing it on a sheet of glass or mirror and zeroing it out while on the glass or mirror which I did and then i proceeded to check the heads on each of my banjos when I calibrated it per instructions and pick it up off the glass or mirror it is now reading xxx pounds and when you place it on the head of a banjo it now reads zero pounds so how could that be an accurate reading and how would that be correct if its reading zero when placed on a banjo head after calibration ???
I ended up re setting it without it sitting on a mirror or piece of glass by just holding it in my hand i turned it back to zero and then placed on the head of my banjo and tensioning the head to 90 pounds is my drum dial messed up or is it working correctly???