For rapid aftershock mapping after last week’s Mw 5.1 near Paso Robles, I need a recorder that holds timing to +/- 1 ms so P-S residuals stay meaningful when we run PhaseNet and STA/LTA side by side; has anyone compared SmartSolo IGU-16HR nodes against a Reftek 130 with a Trillium Compact for self-noise and GPS holdover over 48 hours? I’m trying to balance clean high-frequency picks with deployment speed because the pick quality will feed directly into a short-term hazard update for a few schools on alluvium.