Nothing really new, just wasn't satisfied with either the Hi or Lo positions with my Les Paul.
However, to retain the original 2 switch settings I added a 3rd switch position tuned about midway between the two.
The 4n7* and 680R* "tune" the new switch position. Higher values = darker/less resonance
Verified by me
(Note: I routed a few wires through the central part of the board for offboard wiring convenience)
1978 Gibson Les Paul Standard, Cherry Sunburst