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.
Not only do you have to re-sync them occasionally during normal operation; the belt-driven z-axis fails gracefully, whereas two z-axis motors fail miserably. The belt-driven z-axis has proven to be much more reliable than two motors on the z-axis on every machine we've employed it. It's more efficient, the leadscrews are synced, and it runs faster. The key is...machine alignment. Without that - you should just run two motors...