I'm renovating a 1906 Gibson A4. As you know these are quite different from the later teen Gibson A's
The mandolin is now back in one piece and I've fitted medium strings. I bent the standard Gibson tailpiece up so when fitted there was about 1/4 inch clearance between the soundboard and the front of the tailpiece. When the strings are brought up to full tension the front of the tailpiece is pulled down and comes into contact with the soundboard.
Would someone who has worked, owned or has experience of the early Gibsons tell me if they found this happened with their instrument?. Should felt or something be placed under the tailpiece to protect the French polish/wood.
Have also posted this on the Frets website