Ew... what an annoying AI... I see what you mean now.
Hmm. Ok, in that case, I'll need to add a bogus ability to allow the AI to use both types.
Meanwhile, I would just have the AI use the 1000 kT utility base but fill the extra space with something cheap, so it won't be wasting very many resources compared to a 500 kT utility base.
3.0.1 is ready now btw, at the old address except ending in Proportions3.0.1.zip. I will go update the web page so it's easy to get to.
PvK