Spectroscopic parameters from pure-H (white filled circles) and solar-z (black filled circles) model fits to SDSS spectra are connected by lines for 23 sdA stars that we observed photometrically. We fit two spectra of SDSS J1618+3854, represented by four connected points in this figure. New pulsating variables are outlined in red. We indicate other variables and non-variables from previous searches for pulsating (pre-)ELM WDs for context, along with the empirical low-mass extension of the ZZ Ceti instability strip boundaries (see text).