Thanks a lot for the detailed feedback and for the kind words about the mod — I really appreciate it.
You're right about the collision: both Rustara and No Lava in Pipes define the lava-pump entity/item, which causes the conflict. I already have a clear plan for how to adjust Rustara's prototypes to avoid this, and I'll publish a new version within the next 24 hours. I'll also test it against No Lava in Pipes before releasing.
Sorry about the GitHub 404 — I'll fix that link as well. I'm planning to make the repo public so issues and PRs can actually be opened.
I'd definitely welcome PRs for compatibility with K2SO, Nuclear Science, and other mods. Once the repo is up, feel free to open one, or I can ping you when it's ready.
Thanks again for your support and for offering to help — it means a lot.