Just a thought concerning neck resets; Guilds seem very susceptible to this repair, perhaps because they are built lightly to facilitate the awesome sound, perhaps also because they are so cherished as to be kept for decades. On my forty year-old D40, the last four inches of fretboard independent of the neck had dived almost 3/8” into the body.
If it’s nearly inevitable that the lower fretboard will be levered into the body by the tension of the strings over a number of years, it seems that the factory installation of a thin diagonal push-type turnbuckle from the bottom of the neck block to the center of the uppermost ladder brace would not only impede this downward pull but would allow periodic adjustment of the fretboard clearance to the strings as well. The top has practically no reverberation above the soundhole, and it’s hard to see why the installation of a ten-dollar part could not prevent multi-hundred dollar resets down the road.
Another preventive measure could be to secure a strap post with a long screw through the center of the heel into the neck block—my D-40’s heel had migrated almost 3/16” inch away from the back binding, allowing the neck to angle into the body, and it’s conceivable that a screw installed as mentioned at the factory could have prevented this.
Wontox