it would be useful to present the heading in the "user given reflection list"
as a function of the geometry
h k l 2t om ch ph (for p0d-4c)
h k l ga om nu (for p0d-nb)
h k l x0 z0 2t om ch ph (for f2d-4c)
I find the geometry as radio buttons plus text difficult (cryptic) to understand
a combo-box with more text and machine examples would be much more explanatory