The replicator community doesn't have a guaranteed, proven to work 95% of the time "recipe" for a high powered nickel-hydrogen reactor.
However, I'm convinced that we are understanding more and more of what is required to clean the nickel, degas the nickel, force hydrogen into the nickel into specific spots where clusters of hydrogen atoms can accumulate, and then stimulate that hydrogen so that nuclear reactions can take place. Rossi figured out what was required long ago, and I think the replicator community is catching up with him very quickly.
Here's where I get a bit confused on why Mills/BrLP meets such resistance on this board. Mills' device is now engineered at or close to the point of car engine reliability. The prototypes run at will, even in collaborators' labs. What's more, Mills announced his CIHT generation of Nickel-Hydrogen style anomalous heaters in 2008, at least a year before Rossi started making claims about a device that appears to be based on Nickel-Hydrogen chemistry. Mills shuttered this line of inquiry because, we know now, he was unable to achieve the energy density required for commercial competitiveness. The reaction was rate-limited, didn't scale, and required extensive reprocessing of the components over time.
And here's the big part . . . he achieved the needed energy density only after realizing that the ionizing catalytic reaction required negative resistance such as provided in an arc current. Run the same reaction in an arc current and then you get BOOM. An ionizing catalytic reaction is the only mechanism that would go from negative feedback to positive feedback when the ambient environment goes from positive resistance to negative.
Doesn't this fact pattern suggest a link between the LENR phenomena and hydrinos, and that Mills and his GUTCP seems to bring the control and predictability that so far has been missing in the general LENR setup?