1990
AL#22 p.28   BRB2 p.384            
Rion Dudley                                                                                           

▪ Dudley adds a 1/10″ layer of spruce between the instrument top and the bridge plate of a 12-string guitar, and under the bridge of a flattop mandolin. He likes the results, but is uncertain what the operation actually does to the performance of the top.