can i use the gearbox and monitor for the gears in one of my builds?

also add a trailer that can also go on and off rail by haveing the rail wheels go under the trailer and the road wheels always be down like the truck

make it so you can change tracks from in the truck

Modify, just like IRL brands dont make a new truck each time they want a new configuration :)

Do you modify your existing vehicles or do you start from scratch?