You can start with the 260cm base model on its own for an overnight stay or there is also the option to zip in 270cm metre Additional Extension (AddEx) left and right which can then extend the 260 base model to 530cm left or right or 800cm if left and right AddEx are both fitted. The same AddEx’s can also be fitted to the 390 Base which increases size to 660cm left or right or even an eye watering 930cm if both AddEx’s are fitted allowing the camper additional space for those unexpected visitors.