In an aha moment this morning: In order for FLOW to get the expected result of shrinking the pattern on the mapped torus, onto a torus of smaller r radius, and equal R radius,
it is necessary for the two tori to have the "seam" edge in equivalent locations. In this case the seams can both be in the center curve of the two donuts.
Otherwise the squish and stretch effect will occur as the inner hexes and outer hexes swap places.

(For special effects the seams could be located differently.)

- Brian