Riversong - SE-2 Custom WalnutPatented Riversong Adjustable Neck thru System Our patented Adjustable Neck thru System offers many benefits including: strength intonation less bracing easier playing (due to the ability to make precise adjustments) variable top loading an even balanced sustain, tone & volume up and down the neck (yes even on the body), no more need for an expensive neck reset slinky easy string tension reduced heel integrated strap pins as part of the structure of