What is the difference in the roll bar options?
The single hoop has a tube behind the driver, which is braced, into the engine bay with removable struts. These struts are removed when the body is being fitted. The full roll cage is the same but has the addition of a hoop ahead of the driver, which is connected to the rear hoop. There is another option to special order which is a full roll cage constructed from larger diameter tube and the rear braces are welded to the rear hoop and chassis in the engine bay. This makes the fitting of the body more difficult.