@Dave76
Whether you use one bucket or 2 buckets to fill a small water tank say 100 L capacity, the tank will accomodate only 100L water.
Same concept when you use 1 VK or 2 VK to charge one bottle, it will get the same energy. Isnt it?
VK is the charger and water is the reservoir of energy. Energy receiver is not water but the person who drinks it. Water is just holding that energy till water is consumed.
However if you use 2 VKs to send energy directly to a person by direct request, the energy receiver will receive more energy.
While doing each VOB you are placing intention to one VK for kidney and 2nd for stomach. So they wil work independently. So that is ok.