If you need help, create a thread in questions and support! https://www.beamng.com/forums/troubleshooting-bugs-questions-and-support.5/
Actually, I only use Blender because it supports the transforms that BeamNG needs to load the vehicle properly. All of the actual model editing I do is done in MAX since I like the editor controls and UI much more than Blender. For the JBeam I do use Notepad++, but more often than that I use the visual node editor to make the bulk of the actual beam structure and adapt the existing Barstow beams to the vehicle.
Pleas let there be someone to help finish this. Burt Reynolds should get a tribute. And sorry for the bump