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.
You do not need a voltage regulator. Input voltage for D4r-ii is 3.5-10V. Specs I have for the ESC say it is compatible with 2S LiPo. I’ve been running my setup with no voltage regulator without issues.