charliea
Senior Member
I've worked with a lot of wood over the years, and every piece I've seen will bend if subjected to enough force. Over a period of time this bend will become a "set". The deformation isn't linear over time. Most of the bending will occur early-on, after which the wood will stabilize, or deform at a much slower rate. A lot of things will affect this process including type of wood, rigidity of structure, force applied, temperature, humidity, on and on. Manufacturer and era are only a couple of the many factors involved. Guitars are wooden structures that bend and take a set. Whether the resulting geometry is "ideal" is a personal judgment. If it's not ideal, it needs to be changed. On a Guild acoustic you can lower the saddle, shave the bridge if lowering reduces string break too much and, possibly, adjust the nut. If these adjustment don't suffice, or don't last, a neck reset is indicated but only, I believe, as a last resort. A reset simply isn't necessary or even wise just because you aren't happy with the existing geometry.