When I updated my tools to be Prepar3D v2 compliant there was one tool that I forgot, RADItor. RADItor is a small tool that is mainly used by aircraft developers to edit the radius and bounding box values of a MDL file. Sometimes these values need to be tuned for the aircraft to display correctly in the aircraft selection window for example.
I have now made a new version of RADItor that can edit P3D v2 MDL files as well, besides FSX MDL files. You can get the new version from here.