2019
AL#136 p.48               
R.M. Mottola                                                                                           

▪ What’s the scale length? Isn’t it just twice the distance from the nut to the 12th fret? Yeah, kinda, but there can be a lot of complicating factors when working on old instruments. Like maybe the nut position was compensated, or just cut wrong. Or maybe the 12th fret was a little off. The fret positions might have been calculated using the old rule of 18. Here’s how to find out what’s really going on.