The Improbable Trio
The fact that Kaizen was unable to leave Næġling Falske with +8 Enhancement proved to the Psyker exactly what was described in Wen Chiu's blacksmithing book: it was impossible to get a +8 Enhancement in the real world, even though it was possible in theory.
Even using the core's separation method, and the replacement of crystals as a conductor for the enhancement energy, using conductive ores to guide the energy, it was impossible to get anything beyond +7 Enhancement.
At first, the Psyker thought that if he used silver instead of copper, the chance of getting his weapon +8 Enhancement would be greater. However, he should have thought that the great master smith Wen Chiu would have already thought of such an idea and that the author of the book only chose to use copper because it is a cheaper metal than silver, and that copper would also give the same result as silver.