Hello,
How does the plugin work? Does it collect the latest rates automatically, or do I have to manually add them in somehow?
The Australia Post shipping plugin is only sending your order information (shipping address, order weight/dimensions,..) to the Australia Post shipping platform through that link : drc.edeliver.com.au/ratecalc.asp
And then the plugin just display what was returned from the Australia Post platform after the request.
Note that if you have set the "Group products together" option YES, your shipping rates will probably lower.
drc.edeliver.com.au/ratecalc.asp? to
auspost.com.au/api/postage/parcel/domestic/calculate.json?
But this gives an error message: "The cart items combined quantity is too small for all the possible shipping methods"
Editing that request address won't be enough, you'll have to adapt ALL the plugin code to that different API.
==> The request and the response won't be the same.