Great idea. It's only an extra 85km over double the hills at a higher pace. Pithie looks a bargain, too. They've got this.
BTW, I saw Arnaud De Lie was diagnosed with Lyme disease. Glad they caught it fairly quickly. I know some folks who suffered with that or other pestilence for ages before it was identified. And of course we've seen Froome, Cav, Coppi, et al fall to such things.