MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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Does it touch when the screw is completely loose and the upper arm easily moveable so no pressure is being put on the bottom support part?
Does it touch after you removed the upper arm with only the lower support mounted?
Is the lower support mounted straight and flush on the acrylic piece?