I've fit a nitto rb-021 in a 25.4 quill before and didn't give it much thought. It was a pain to get it through but it worked. But you're right, the stratos might be too hard. The bends are a bit more than the nitto and may be just enough to make it impossible. This sucks because it ruins my plan for the new fork I wanted. I don't want to give up the stratos though. Did you try prying open the stem a bit for more clearance? I need to find a quill to test on.