One other thought about Dufour’s hypothesis of a VERY SIZEABLE INCREASE OF GRAVITATION AT PICOMETER DISTANCE (on the order of Coulomb repulsion). This provides the effective pressure, on the order of hundreds of gigapascals, which is required for the known version of metallic hydrogen. The denser version is merely a further step and not unexpected if gravity operates this way.
http://www.iscmns.org/asti06/J-DUFOUR%20-%20ASTI%20PRESENTATION%20-%202006.pdf Ten years ago, Durour is talking about a model with several binding energies for hydrogen in the range of several hundred eV and actually mentions the value of 650 eV which Holmlid settles on. No one paid much attention then. But Dufour goes further to imply that LENR does not need nuclear reactions if “picochemistry” involves any kind of asymmetry since the chemical energy level is so great. That would open a Pandora’s box which apparently he wishes to avoid, so the details of how picochemistry would ultimately be powered (ZPE ?) are missing. In so doing, he left open the door for Holmlid to get most of the credit… but LH deserves it. He has taken a huge risk, published tirelessly - and could come out of it with a big prize.