  In this note we reconsider the late-time, power-law decay rate of scalar
fields in a Kerr space-time background. We implement a number of mathematical
and computational enhancements to our time-domain, (2+1)D Teukolsky evolution
code and are able to obtain reliable decay rates for multipoles as high as
$\ell=16$. Our numerical results suggest full agreement with the proposed decay
expressions in recent work for both the finite distance, and null infinity
cases. We also study the same in the context of extremal Kerr space-time and
find that the same results hold, except that the horizon tails follow the null
infinity expressions instead.
