Can anyone provide a detailed (with drawings if possible) instructions of how to combine the Kohler Rite Temp 304-KS Valve and the Kohler K-728-K-NA Transfer Valve to provide water to a hand held shower head and a rain shower head, individually and together? I have been told by the customer service folks at Kohler that these 2 valves can be connected to provide 3 showering options (hand shower, rain shower, and both hand and rain shower), but my plumber said he only knows how to combine them to provide water from either the hand shower or rain shower, not together. Thanks for any help.