RV zero-point stability for the three instruments distinguished here, Coralie07, Coralie14, and Hermes relative to the overall VELOCE zero-point set by the combined dataset of all Cepheids, which includes stars observed with both Coralie versions, as well as with Hermes and Coralie. The vertical scale and color scheme is identical to Fig. 25. Horizontal errorbars indicate the time span of the measurements. Outliers from the median are mostly due to imperfect template fits or low-amplitude signals mimicking temporal variations in υ_γ. The Hermes zero-point change due to the intervention in 2018 is visible near BJD 58300, cf. Table 1.