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.
If I get you correctly, You can use larger bed, but you would have to prepare bigger frog for it. The rest is matter of longer rods, no other plastic parts have to changed. Of course you need to adjust firmware for bigger print area.