Tried the recommended setting and things have improved dramatically
. Thanks for the website pointer
Only 3 issues left.
1. Navigating in Town, The closeness of the junctions is obscured by the arrows. Maybe zooming in would help
2. A short off road section cause the garmin to try and route via the road. I checked the ridewithGPS route and it is definetly correct
3. The unit takes some time to autoscale maps after an off road ( cycle path section )
thanks for the help