I have a problem, I'm trying to do a model of special building for Volkswagen Amarok. I got a car model, got frame with important mounting holes but I need to make a "middle?" frame (I don't know how it is called it English). This is the frame between a building and a conveyor frame. I know which one profile should i use, created it into, but I'm asking myself how to do this. Is there somebody who did special building earlier and know how to do this? I need to do this for my engineer thesis and now I'm just asking myself how.