From Parallel Lines with the Ends in Tandem, or from other formations with the Ends in Tandem.

Outsides 1/2 Zoom & Hinge as Centers Counter Rotate 1/4.

起始于 Parallel Waves:     Detour 之前   之后	起始于 Twin Diamonds:     Detour 之前   之后
起始于 unusual setup:     Detour 之前   之后

参见 Prefer CONCEPT for a variation of Detour.