It’s like a classical guitar design, that has been around for hundreds of years, where you just make a deeper cutaway on the treble side to be able to reach the upper frets without changing fingering tecnique in your left hand. Also on the upright bass, derived from the Viola da gamba, you have the body meet the neck around where the 9:th fret would be. But there you have to change technique to thumb position. Our Series IV has 4 different cutaways: Normal, Extra, Extreme and Laidback. Pictured here are only Laidbacks.
A bump is made at the back of the neck at 2:nd fret for familiar left hand feel at standard tuning, and easy capo placement. (Bass pictured: 8800$).