I’ll move some of the clutter over here from the “Nozzles” thread. If flow is the problem, how about a pressurized water feed? The flow depends on the pressure drop across the needle valve. If it’s gravity fed, changes in nozzle pressure and surface tension effects change the pressure significantly. With something like an insect sprayer, you could put 5 psi or so in the tank, and pressure changes at the valve would be much smaller, percentage-wise.
This suggestion doesn’t mean I’m not eager to see how the misters work.