As the carrig-PlugIn seems to fail in some cases:
How musst a realtraffic vehicle been structured to be used as a transport-object?
So, I think, the wheels have to be seperated - evryone under a NullObject. The wheels are then positioned under an other Null-Object called Body. Chasis and other parts have to be placed also in this Null-Object, richt? Is there any rule how objects have to be seperated (for example the different parts of an wheel?).
Where do the axis have to be positioned for the Body / the Weels.
In which series the wheels have to be positioned under the Body-Object?
Would be fine to find this in future Manuals.