Random Stargate Question:

[oceana]

In the Fifth Race, Jack builds this thing, that - as we have learned now - was some kind of ZPM, in order to reach the Asgard world.
He used only stuff he found on base, one of the parts came from a staff weapon I believe. And we never managed to rebuild it? Was it destroyed, so that they couldn't reconstruct it, or are they just really dumb? It would have come in handy in Atlantis.