Does anyone have a Laguna PT796 Basin? That is the large one with outside Dimensions: 180 x 120 x 60 cm (70" x 47" x 24") and Volume: 950 L (250 U.S. gal.). What I am looking to find out is the inside-bottom dimensions (length and width). If anyone here has this item and can get these measurements for me I would be most thankful.