Most of what I do is AABA, (sometimes AABACA).
Over time I've found the easiest way (for me anyway) is to simply unfold the song linear - set number of choruses to 1 and type the lot in. Easier than you might think if you use copy and paste to add A section en masse.
I find I have more control over endings and because its linear, if I fancy a different chord in, say, the middle of the second A section, it affects nothing else.
HTH
Ian

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