My female cat sprays towards the back of the hinged box, and it manages to get right between the upper and lower sections. I really want to try a stainless steel model, but the only ones that are truly “high backed” have high sides as well. With high-sided boxes, she doesn’t like to turn around and aim towards the back. Do any of you know of a stainless steel model that is seamless, has a raised back, but no raised sides?