I had not considered charly time until your post, maybe I could do it. I did a sub 14 hr and sub 24 hour on 400 and 600k, respectively. The 600k only had 7500 feet climbing but I did it solo with a mechanical. If I get to Brest in around 24 hrs, I will give it a shot. Only planned sleep stop will be at the secret control after loudeac on the way back. Sounds feasible. Crazy but doable.