"Don't dispel your beam yet, as should be your default since I didn't order that. Now..."
He creates a sphere of--not falash, a lesser three-dimensional weave, like a cross-section of falash. It leaks like crazy; he's visibly maintaining it with all his own power.
"This is me imitating a charging node. I want you to move your beam so that it intersects mine; and then, by your will, adjust the phase so that the cross-section of your falash beam which intersects it, is exactly in phase with this fake charging node. Divergences will be visible to you as dissonance and leakage; will the beam's phase to shift in the counter-direction of the sensed divergences causing those sensed leakages, until the leakages are gone."
"Did that make enough sense so you can try it and I can see what you tried?"