If there are tweaks that make it better for Reticulum, let me know.
I've been busy in the fiat mines and spending a lot less time on nostr and mosaic both. But I'm not in a hurry, I think more time and more thought up front will make a more robust protocol in the end.
I just moved the signature to the end of the record so that in the future it can be of any size, but I didn't create support for multiple cryptosystems yet. That can come later. Next I need to build out the reference implementations (server, client, offline tool).