Just returned home from a near month long trip to MT and ID. We slept in the Hawk except for when camping off the motorcycles.
IMO, the upgraded shower wand is a huge improvment over the white FWC factory installed wand. The ports in the handle induce a venturi effect upon the water stream greatly increasing water psi at the shower head. I did not measure water consumption during showers, but, I did not notice the need to fill the water tank any more often than with the factory wand.
I consider the upgrade well worth the minimal investment.
I did install the wand on the FWC factory water line. This allowed me to use the shower hose/wand fixture installed on the Hawk.