Whew, thanks for the headsup, I was about to try that today!
So obviously the RATO isn't synced. I got to admit I was a little skeptical when I saw that the 234 was capable of formations. Given how tenuous the link is between the conventional buffs in formation, the higher speed seemed to be asking for trouble.
I actually think that the formation should be disabled for the Arado. Historically, they hardly ever flew in formation, but often singly. There's no defensive benefit from formation.