1978
DS#86   LW p.110            read this article
Tim Olsen                                                                                           

▪ No, you don’t press a neck to take the wrinkles out. Sometimes it’s necessary to heat a crooked neck, overbend it with clamps, then hope it cools and relaxes into some semblance of straightness. This sort of caveman lutherie is still called upon from time to time, and you probably won’t find a more detailed description of the operation than this one. With 5 illustrations.