When we converted CX16 we needed as much storage space as possible, but the single seat is much more comfortable. The solution was to keep the double seat base and make a fitting that allowed us to keep the single seat, this is a steel sheet, hinged at the front, with a sliding pin catch at the back that keeps it in place. I fitted a hydraulic ram under the seat which raises the whole seat structure when required. CoastVW did all the metalwork for me. We had a swivel base before and didn’t use it much, and as we had a toilet installed behind the passenger seat we couldn’t fit a swivel anyway.