Recent work associated with upgrading the SuperKEKB $e^+e^-$ collider with polarized electron beams and
Chiral Belle’s program of unique precision measurements using Belle II will be described. These include five
values of $\sin^2\theta_W$ via left-right asymmetry measurements
($A_{LR}$) in $e^+e^- \rightarrow e^+e^-, \mu^+\mu^-, \tau^+\tau^-, c\bar{c},b\bar{b}$. $A_{LR}$
yields values of the neutral current (NC) coupling constant of each fermion species that will match (e,$\tau$)
or greatly exceed (b, c, $\mu$) existing $Z^0$ world averages precision, but at 10GeV, thereby providing unique
probes the running of $\theta_W$. The program also probes new physics via the highest precision measurements
by many factors of NC universality and tau lepton properties, including the tau g-2. After providing an
update on Chiral Belle's physics potential, we will report on recent R\&D related to provision of the
required hardware, including modest upgrades to the SuperKEKB electron ring.