Picked up brand new Plus 4 yesterday. Very enjoyable afternoon induction to Morgan driving - particularly enjoyed cheers from group of schoolchildren. But speedo analogue and digital readout went completely awry after an hour or so. I’m sure it will get fixed under warranty but is this a know problem? Was stoped at roundabout and speed and Analogue read out showed zero. Digital readout showed 35 mph. Cleared up later but disconcerting....