Duplicating records from a form with multi tiered subforms (1 Viewer)

Hi,

I can duplicate a form with a single tiered subform but if my subform have their own subforms I am having issues finding a way to do this. I am using Allen Brownes example but I wonder if anyone can advise?

Below is a picture of my table relationship :



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*Disclaimer: Listen to my fledgling ideas at your own peril and amusement. Sometimes I get it right, maybe you'll get lucky.

Append queries?