Except for one little, niggling idea, the one that flashed into mind when Buddy was describing booster technology. SPISES didn't sound too unlike 2XS, neh? Of course, even if that was true, it didn't necessarily mean anything. "Convergent evolution" happens with technology as well as with life forms, and damaging developments frequently spin off from beneficial discoveries. But it nagged at me, and I had to confirm or deny it.