I recently made the miter saw stand from Popular Woodworking.
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have been wrestling with dust collection for a saw on a movable stand. Inspired by the website of Barry Burke:
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(scroll to the bottom of the webpage)I have completed my version of his dust collector. It works quite well. It is large (40" across) to accomodate the swing of the saw from left to right. I have posted pictures on alt.binaries.pictures.woodworking