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.
The top supports for the legs should've been designed such that the original IKEA double ended screws are used to assemble the leg/top support to the table top itself. 6x50 wood screws do not have enough 'meat' on the thread to bite into the table top with enough grunt to hold the supports square/true. Once you've then screwed the legs on with the 6x20 screws you're stuffed, you cannot tighten up the main 6x50 screw when the eventually work loose.