For this interested here are the route taken ..
Using info from “best biking roads” and the best I could find from proper paper maps
The natural parks were stunning .. fabulous roads akin to good flowing U.K. A roads and twisty B roads
Great surfaces and very little traffic apart from be big towns which we mostly avoided
Lots of positives from other road users .. letting us out, thumbs up, waves and slower vehicles pulling in to let us pass
All in all .. pretty good so far and I’ve whist kicked over 1000 miles in 6 days
The first part of the routes attached I did solo down from Roscoff to Saumur