Bossard have moved their May 7th event to the F11 due to roadworks on the F15. Faster than the H10/22, but you'll want to get your chain retention sorted to deal with the bumps in the first couple of miles :-)
Don't have broken front derailler hanging around I can cut up do you?
I've actually bought bigger DA9000 rings so will likely be running a standard double Di2 setup again - no point being more aero if it means you're sat by the side of the road..
H10/22 is dead to me.