“The data for LENR is solid”
No, it is not, and you are no expert in nuclear physics to make such a statement.
No, and one doesn't need to be.
What I am is an excellent experimentalist with deep knowledge of measurements, both nuclear and chemical. I am more than sufficiently qualified to examine the experimental processes run, the data yielded, and the quality of the work done.
The very best evidence comes from plain old chemical measurements....specifically measurement of heat by calorimetry, and the before and after concentrations of helium by mass spectrometry, both of which are straightforward chemical measurements. The proof is there, and covered suffiently well in Beaudette's book so that even a layman can understand.