  In this followup analysis, we update previous constraints on the Transitional
Planck Mass (TPM) modified gravity model using the latest version of EFTCAMB
and provide new constraints using SPT and Planck anisotropy data along with
Planck CMB lensing, BAO, SNe Ia, and an $H_0$ prior from local measurements. We
find that large shifts in the Planck mass lead to large suppression of power on
small scales that is disfavored by both SPT and Planck. Using only SPT TE-EE
data, this suppression of power can be compensated for by an upward shift of
the scalar index to $n_s = 1.003 \pm 0.016$ resulting in $H_0 =
71.94^{+0.86}_{-0.85}$ kms$^{-1}$Mpc$^{-1}$ and a $\sim7\%$ shift in the Planck
mass. Including Planck TT $\ell \leq 650$ and Planck TE-EE data restricts the
shift to be $<5\%$ at $2\sigma$ with $H_0 = 70.65 \pm 0.66$
kms$^{-1}$Mpc$^{-1}$. Excluding the $H_0$ prior, SPT and Planck data constrain
the shift in the Planck mass to be $<3\%$ at $2\sigma$ with a best-fit value of
$0.04\%$, consistent with the $\Lambda$CDM limit. In this case $H_0 =
69.09^{+0.69}_{-0.68}$ kms$^{-1}$Mpc$^{-1}$, which is partially elevated by the
dynamics of the scalar-field in the late universe. This differs from EDE models
that prefer higher values of $H_0$ when high $\ell$ Planck TT data are
excluded. We additionally constrain TPM using RSD data from BOSS DR 12 and
cosmic shear, galaxy-galaxy lensing, and galaxy clustering data from DES Y1
finding both disfavor transitions close to recombination, but earlier Planck
mass transitions are allowed.
