Trade Goods - what happens when you gain / lose them?
I was wondering what happens to the effects of trade goods to the civ that built them but lost them to an invasion. Obviously the invaders get the effects but do the losers lose those effects? I imagine that anyone who trade for them will still retain the effects, right? So, in some ways its better to let someone else build them and then trade them for it so you can never lose the effects.
More specifically i was wondering about the Xithium (yea, i know, nice spelling). I took a Thalan world that had this built on it but didnt see an immeditae increase in hitpoits of my existing ships. Do the effects of that trade good only effect new ships, or should i have waited to the next turn to check the hitpoint total, or do the ships have to "repair" to get to the new hitpoint total? I guess then I'd also have to ask what happens to the hitpoints of the ships of the race that lost that trade good?
Completely seperate topic, but since I'm here... I was under the impression that the Omega Research building increased your research civ-wide, but a recent post on these forums suggested that it only works on the planet its built on. Is this true? I guess it would make sence, since a 50% increase globally would be tremendous. I wonder how many times I built that thing on the wrong planet