From my experience, the main challenges are making it compact while still feeling like a “real” instrument. Watch the neck joint strength, tuner placement, and overall weight distribution because a small body can easily become neck-heavy. Also think about how it will be transported—rounded edges, du...

On this question, the 23mm measurement is almost certainly the neck shaft before the fretboard is added, measured at the heel. A typical separate fretboard is usually around 6–6.5mm thick before radiusing. After radiusing, you'll still have roughly 4.5–5mm at the edges, which is plenty for standard ...