Has anyone rebuilt a 70's era 4/4 seat base. Driving back from Williams I could feel the inside edge of the wooden seat frame which seems to be shaped like a doughnut i.e. a wide peripheral frame with the centre section missing. My posterior is fairly narrow (ok maybe too much info!) and I'm hoping replacing the frame with a solid base would be better. Unless there is seat webbing which has slackened off! I'll need to take it apart to find that out though. Anyone been inside one?