After only three months, we are already making our first measurements of spectral holes burned into the inhomogeneously-broadened 1532 nm transition of erbium in LiNbO3 at a temperature of 1.1 K. Together with 2- and 3-pulse photon echoes, this characterization is the bread and butter for all groups working with rare earth-ion-doped crystals for quantm information processing.