You are welcome.
I use either handor both. It depends on the situation and the flow of the energy. Sometimes, a person is in a hospital bed, or some other situation and I use whatever hand is most convenient.
Sometimes, I just go by feel. And also, sometimes one hand gets tired, so I switch hands.

In Level II, for certain techniques, we use both hands at the same time (heart, lungs, blood pressure, blood sugar, cholesterol).