Outside is not so important, as long as >100 points. Inside close to r=0 also not sensitive, but getting closer (> 75% * R) to boundary needs better mesh. Presumably due to high initial gradient.

Code can be run for nu=10^-15 or 10^-6, significant deviations for precision=1.

Whether or not two meshes agree well numerically seems to depend on
how well connected two differently spaced mesh domains are.