4 Wheeled Z Guide with tensioners
thingiverse
Much preferred the 3 wheel'd RE-D-Bot Z guides over the original 4 wheel guides, But still thought that the bed could be held 'more square' Wheel positions have been moved outward to reduce leverage, and tensioner features added to both wheels on one side. 2off M5x20 replacing M5x10 on the 20mm wide sides
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