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.
Yes, if you use a silicone sock to insulate the hot-end. Print the parts in PLA, then assemble, and then print again in PETG. Your Ender 3 is fully capable of printing PETG and even ABS. There are many YouTube videos on how to setup your Ender 3 for PETG. It is mostly in the slicer settings.