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 upper arms are installed 'loose', the screws are maybe half a turn into the nuts and I even have a small gap between the upper arms' top edges and the bottom of the top piece of the acrylic frame. If I tighten them at all I get the Y wobbly I talked about.
When you talk about the top piece of the frame moving in the x axis, do you mean left to right or front to back sort of motion? I've never noticed any of either with my build?