Maybe I am mistaken, but I think that the powders Mr. Ekstrom has are the same as analyzed both by Andersson and Schoberg 2012, and Edstrom et al. 2013 already, as these came from Mr. Kullander. There was about a gram each of fuel and ash by late 2012, when received by Edstrom et al.
If so, no Li in the fuel is not a surprise, or the copper chunks. Where the Li lives in the ash might be new information. Probably much Li has degraded to some miscellaneous oxides, nitrides and hydrides over the past several years, however. Possibly the lithium may have formed Li3O4P with the phosphorus found on the copper braze pieces, explaining the possible similar spatial distribution.