I'm wondering where I can find, or if anyone even makes, stems with ZERO reach. I assume that it would be easier to make a threaded one, if not impossible to make a threadless one. A stem with zero reach would have the bar clamp directly on top of the steerer tube, making the rotational axis the same as the center of the handlebars.
I don't know if anyone makes these, but I'm pretty sure that I've seen them around. I suppose that if worst comes to worst it would be possible for me to make my own - take a normal quill, chop off the elbow and weld the two arms together as straight as possible, haha.