sneakywrist, don't be put off by the occasional snarky comments, there actually is some valuable information and knowledgeable people here more than happy to help out, but you get the fun answers when questions are a little vague. Your question seems to be that the bar diameter is too large for the stem. Is the stem steel or alloy? If it's steel pry it open a little, 0.56mm is a very small dimension and steel should be able to take that. As for the quill, is it to small or large for the fork steerer tube? Either way it is the wrong size and the correct size is readily available, probably in many of the boxes of crap hoarded by the people here.