Has anyone run handheld LIBS alongside a pXRF during reconnaissance mapping? We trialed a SciAps Z-300 with an Olympus Vanta M in July on about 120 grab samples over serpentinized ultramafics near the Bay of Islands; LIBS helped with light-element trends, but pXRF gave tighter Ni-Cr-Co precision — what calibration routines and sample prep (scrape vs quick grind, 5–10 s dwell) have improved field precision for you without killing traverse speed?