As with most bugs it’s simple once you’ve solved it. Here’s a Python gist should anyone want to experiment with it themselves:
https://gist.github.com/rossbates/d5bb4fdd728bf18536a2c0ebf2960519
I’m using this blossom/go server which has been easy to configure and run:
https://github.com/sebdeveloper6952/blossom-server
I’ve also found this web client from nostr:npub1klr0dy2ul2dx9llk58czvpx73rprcmrvd5dc7ck8esg8f8es06qs427gxc to be really helpful. Even works testing locally