Just properly used my Garmin Edge Touring and it's great. Created the route in ridwwithgps and all was fine apart from the section it wanted me to do on a canal path which I ignored as it simply was not suitable for my road bike.
How to I avoid this in the future?
When creating a route I can see I can optimize for driving as well as cycling, but then it tries to route via major A roads which is not what I'm after.
If you just put in start and end points, it is doing what you asked it to do!
Solution 1 Zoom and view the route, add control points before and after the section you want to avoid, and then click and drag the route between to the road you want to use. repeat as necessary
Solution 2 Plot the route point by point on the roads avoiding track and trails
