For some reason, while the trainer will give me one-turn units, one-turn research, and I suspect unlimted travel (which I don't use) ... I can't make it do one-turn buildings. Not even regular buildings (in case wonders are treated differently). Any ideas why this might be?
Edit: Also, 1-turn research doesn't just affect the 'currently shown' items. If I turn it on, and get one civ done in one turn, then turn it off - I get all research for one turn up to (usually) around astonomy then it eventually stops.