Excessive soundboard "bellying," caused by string tension, can make an acoustic guitar difficult to play. It can even damage the top, bridge plate and bridge. Replacing the original bridge plate to correct the problem is a time–consuming job that can unfortunately reduce the value of a vintage instrument.
Respected luthier and restoration expert T.J. Thompson developed a simple tool set, the Thompson Belly Reducer, that can fix soundboard bulging without permanent alterations to the top or bridge plate.
T.J. Thompson explains the inspiration behind the Thompson Belly Reducer
Save the bridge plate and save the value of your vintage guitar! T.J. explains the inspiration behind the Thompson Belly Reducerand morein his interview with Dan Erlewine at the 2010 NAMM Show.