peter Hi Peter, thanks for responding.
The initial question was regarding Under The Milky Way which is xAEACE (the straight open minor) then x AEAD(the sus)G(or open E).
I incorrectly thought the underlying chord was on top of Am voicing (meaning a C should be present in the chord), however when the sus4 (the D on the 2nd string) is played, that D actually repaces the C (the minor third) so the chord is probably A7sus4 (which will probably work in ST3).
Thanks for the example, it helped me thinking it out loud.
Thanks for considering the custom chord idea. I thought it may impact other areas. Maybe I just need to learn the tunes well enough so I remember I have a walking F# bass over my D chord (i.e. D/F# which is how I write it with a pen. HeHe <:o)
Thansk again mate, appreciated.