Gotta point out that ActivityPub doesnt add “a bit of Mastodon”, but it completely CONVERTS your system into a Mastodon / ActivityPub-based system.
Thats what I found “challenging” = very annoying and confusing, which is why I didnt test it any further.
But as offered above, I can create a fork based on the last working version, and maintain it, potentially with backports. Its just I wouldnt use it in my regular daily life.
cu, w0lf.