Based on my HO scale 1-piece cover. I would recommend the FUD material due to the fine detail on this model. Dimension across deck face is 20mm. Dimensions of cover body are 77.5mm L x 24.5mm W x 25.0mm T. Overall length is 85.0mm (over closure brackets). These dimensions are based on the actual cover dimensions of 40' 9" x 13' x 13'. This model has printed successfully, but based on feedback from one customer, I have added cross-bracing on the open face to prevent warping of the sides.