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 bottom looks good but the threaded part with the overhangs looks to be the problem, right? If overhangs are an issue with PLA its normally because there is not enough cooling. Do you have your cooling fan turned all the way up? Do you have a large fan with a good nozzle?