Unsupported Nix D-Series Parts V1.5

I've been working on some new parts for the D-Series Pickup, this is beta version so more updates will probably happen as I learn more about modding this game. Enjoy!
Nix D-Series Parts thread: https://www.beamng.com/threads/nix-d-series-parts.75967/#post-1266983

D-Series Parts Pack V1.5:
Gasoline fuel cell (red)
Diesel fuel cell (yellow)
Propane dual tanks
Bobbed frame (for reg. cab body)
Bobbed ext. frame (for ext. cab body)
Crawler roll cage (for short, standard and bobbed...