Yes that is OK. Working these things out and trying to describe them helps me with ID too. "It does not feel right" is not quite good enough an explanation
Thanks Wendy EM.for these useful notes which improve on my fallible image recognition skills. I have added your notes to the Description Box for H. opulentellus in the species List. I hope you are OK wuth that,
separating H. opulentellus and H. grammellus - H. opulentellus has a white line along the costa from the base to about 1/2way along the wing, this overlaps with another white line a little further in which runs to the apex - this is a bit obscured by the grass stalk above but is still visible (H. grammellus has a single white line, a little in from the costa, running from the base and the main white line to the apex.) H. opulentellus has 3 short lines extending from the termen between the main white line and the apex (H. grammellus has more longer lines running from the main white line to the termen) https://inaturalist.ala.org.au/taxa/244572-Hednota-opulentellus https://bold-au.hobern.net/specimens.php?taxid=329645 https://inaturalist.ala.org.au/taxa/355165-Hednota-grammellus rn.net/specimen.php?processid=ANICS255-11