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Evaluating the MR-1 CNC Mill Accuracy by Machining & Measuring a Circle Diamond Square test coupon. Many folks have been asking about what type of tolerances MR-1 can hold when making parts and we hope that this test provides a realistic expectation of the machine's performance capabilities. Watch the complete video with the full test report results on our YouTube channel! • #mr1 #cncmachining #langmuirsystems #metalworking #smallbusiness #machining #instamachinist #machineshop #milling #machini