Apologies for my late response - I had a bit of a family emergency for a while there...
Thank you for the help. I swear I'm almost there but must just be missing something. Specifically, I'm posting to ElasticSearch, and it seems to be going well, solving connectivity issues and getting past a 404 response. But I'm now getting a 400 (Bad Request) response, and I can't easily get past it... Is that something I should post more details on here, or is it worth asking a new question about that?
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