I got a Nitto Technomic Deluxe stem today and am having some trouble with it. I can only get it in to about the minimum insertion mark. The original stem will go in farther. I figured that maybe I had slightly bulged the steerer tube or something, but seeing the thread on tapered steerer tubes makes me wonder if that is what is coming into play. The wedge of the original stem is shorter overall and rounded at the bottom while the Nitto's is more squared off. The short side of the original wedge is also very short while the Nitto's short side is maybe .75 cm. Wish I'd seen the tapered steerer tube thread earlier because I've already taped up the handlebar. Are wedges interchangeable between stems? I didn't think to try the wedge from the original stem on the Nitto stem, so I don't know if it would make a difference anyway, but if it's safe to switch them I'll give it a try.