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.
Just put a piece of paper folded in 3 between the guide and the frame. That way you won't scratch your frame. I did it and it works pretty well. Another idea is to put some small rubber foot/bumper inside so that it will stick.