Is there a way to export everything from a G1M file and import it back into G1M?

[BenXX]

Hey!
I'm trying to export AND import 3d model data from and into Dragon Quest Builders 2 and I've kind of hit a brick wall.

I've found the g1m_tool that exports G1M files into .fmt / .ib / .vb files but I have no idea what to do with them.

Is there a tool that can convert those into useable files like what Steven's Gas Machine does?
There you'll get the 3d model as an .obj plus the material and skeleton files.

Or is there even a tool that exports the .g1m files into useable files and that can also convert them back into .g1m after altering them?