I don't think that how it works once we reach x level in infra we get those benefits indefinitely unless we drop below -1 and even then we get it back once we go back into the postive.Infrastructure to 5 should be our next overriding strategic goal here, given how so much shit is gated by them. VI back to 7 means we can absorb the hit from colonizing Itani though without our SDF forces becoming weaker, which is important given how Itani is still going to be regularly jumped by Orks.