Aeronautics military trucks

I tried to design player-scaled realistically looking vehicle, that could be effectively used in game. With a few modifications this builds can be built and used in survival. There are three variations of the same basic design. Two are simple six-wheeled trucks. One is a semi-truck that can tug along trailers, attached to stickers through swivel bearing. Trailer is included in one of the files. It is designed to carry two maximum size item vaults, that can be attached to it with stickers as separate physics entities. To attach trailer to semi truck you just need to activate swivel bearing, so that it's end becomes separate physics entity. This entity is than attached to stickers on the truck.