thx hung for the news, even if they're a bit bad.
If the Infrared-LEDs shall create additonal directional and polarized radiation the device gets more to receive.
If it's an industrial secret don't you have fear sometimes military institutions will come and take it completly away from the civil world? Maybe they haven't use for it now, but you never know when this time comes...
However we can built already such devices on our own and tune them up until they work as best as possible so the PDC210 also is just one design of this that worked out very well.
I wrote this lately to somebody else:
If you find a treasure with Mineoro device out in the wild, why don't you just wait and call other Mineoro owners and LRL-interrested people so they can verify that their units are really working?! Wouldn't this be the best idea?
Not a treasure or gold-vein deep in the jungle, but perhaps near a big city of course!

This would remove the skepsis and would be a prove it really works while the Mineoro sellings would raise rapidly, resulting in a not so extremly expensive price.
However thank you hung for sharing your experiences here with us and i wish you further very good finds, whatever detectors you're using.