So a hard day this was.... COP about 1 in our new setup with changed water, hanger and rubbers. Mostly distilled but 20% tap was in, unfortunately we did not have enough distilled left.
Impressions:
1) The straightness of the pipes in the water and the even spacing around the cylinder seem very important.
2) Bubbles, the "ionized" bubbles pop like crazy and are real heavy, like a boat in water floating on the surface attracting in new small bubbles making massive bubbles on the water surface. That is real Brown´s gas, the other stuff is not nearly as reactive.
3) Copper pipes with very small spacing of 1 mm was used, very large and rather ionized bubbles but they stick to the copper surface so production is very low. If you use copper pipes you will need big spacing and probably some insulation, maybe not practical.
4) My tone vibration with Delirn holders could not be reproduced today since we only had a little distilled water left and with tap we got bubbles.......

Well, all in all a very long day, tomorrow is a new day let´s focus on that one.... Many things left to try. Starting by tuning hte pipes acoustically, then trying to find a way to resonate them.
Anticipating a crystal solution I foresee the need of ambient air with water spray(transducer fogger), if the temperature of the water rises you can not match the crystal resonance with the pipe resonance freq.,, that is another reason for ambient air with a water nozzle. Just some idea for now. Goodnight.