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So...I spent the extra $ on the HIWIN Rails that were suppose to be "smooth as a hot knife on a butter right out of the box." But that was not my experience from the set I purchased from the AliExpress seller linked in the BOM. Out of the box, it felt just like the clone I purchased from eBay, I turn them up vertically and the HIWIN Guide Block does not glide down at all. Does anyone have suggestions to make them slide across smoother?