Minor correction: even without being premium, these natives will give you tech 10. All the other tech levels at the base will be limited to tech 7, however.
One more caveat: if that starbase ever gets damaged and its tech levels lowered, you won't be able to raise it up to tech 10 again (at least, not without destroying and rebuilding the starbase).
Show Media Item - Minor correction: even without being premium, these natives...