Hi All, just fitted my passenger side, leisure battery, swivel seat. If I slide the seat back, the seat cross bar the (part of mechanism that slides it back and forth) hits the central nut on the swivel. Has anyone else had this? Am I missing something or do I have to fit a spacer to give it clearance? Seems odd this hasn't been factored into the design, so worried I have fitted it wrong. Any advice from anyone? TIA