Nice!!! That is my plan exactly, so it's good to see that the disc sticks to the case. To date I haven't seen a better looking mounting system for this phone.
Agreed... the phone mounting disk barely adds to the case, so the phone still stays pocketable. It only remains to be seen how durable the mount stays. I do recommend supporting the M2 when you mount the phone, especially if the M2 is extended away from your dash as in my pictured mount.







You have less than 2 inches of clearance. For my car it's important because I don't want a giant charging port sticking out. 