Route home - recommendations from the Swiss-French border

[blueovercream]

I'm going to a wedding in Northern Italy later in the summer. I'd like to make a bit of a trip of it and take my Elise.

I've got a rough idea of a potential route to Italy that will take in the San Bernadino and Stelvio Passes and I've plotted a route home again that could take in either the Furka Pass or the Susten Pass.

It would be a shame to end the fun there though! I'm looking for suggestions for routes that continue towards Calais on "drivers" roads, or if anyone has any recommendations for particular roads to include on this part of the trip. I'll have 3-4 days to get home to Scotland from mid-France.

Thanks!