Basic great for second shower
Kohler & Hansgrohe Shower Setup

Kohler Willamette K-R99903-4G-CP valve, Hansgrohe Unica bar 28632000 Raindance hand 26036001 handheld

Perfect for master shower
Hansgrohe Shower Setup

Main valve Ecostat Thermostatic Valve w/Integrated Volume Control & Diverter 04231000, Unica bar 28632000, Raindance handheld 26036001, Rough-in valve not shown.  Grohe wall union Tempesta 26636001 
Valve diverter Function positions, 1) off,  2) main head only,  3) handheld only,  4) both at same time

Kohler & Hansgrohe Tub Setup

Kohler Willamette K-R99903-4G-CP valve & tub spout, Hansgrohe Unica bar 28632000 Raindance hand 26036001 handheld