Thanks @Arathorn. That's great to hear an FDroid candidate's available. Great turn around! The only device I'd have to test it on right at the moment, unfortunately doesn't take 3rd party APKs (FDroid's been signed, but I'm reluctant to otherwise open that particular device). Will see what else I can pull together. I could sign the APK with my own OS build, but then I'd miss OTA updates (so a different security risk). MicroG sounds a good option. As for Copperhead specifically, I don't think MicroG will be on the table for a while though. Another push would be ideal I suppose (but I know you need to balance priorities).