I have favoured C, charactis over C. basicunea based on the wing pattern samples of the species provided by donhe which tends to conform what I have seen as a series of C. basicunea photos on both iNaturalist and the ALA, although it must be said only Bold Systems and Moths of Victoria provide a few images of C charactis for comparison. Both alternative species as presented to me for decision by CNM in this instance have been recorded in the ACT. C. dispila has been recorded here too, but looked disticly different to me, see Sighting No 4247544.