Can we arrange a test . . . . I ran the MH32 using Dreescode/Snack at various Re to try & encompass the range you gave as an example. is it possible to determine how the results compare?
Yes, and the best measure of validity would be comparison to actual (wind tunnel) test data.
Consider the following 3 charts of MH32 polars. This one is at Re = 70 / 100 / 150K in Profili/XFoil, for comparison to DesignFoil: