Well I got a MMM in the mail today from castle. Might be a v3, but it still has the female bullet connectors on the board for motor and batt connections. Looking from the top the fan appears to have more clearance between the blades and the top grille. The brain board is different. The lower case is still not right, the fan plug still touches before the board contacts.
Brain board, note the difference in the Bec circuit, upper left area:
Lower case showing imprint of fan plug:
Upper case showing some clearance between the fan and the case?:
Inside of upper case:
In the next 2 pics note how there is a gap between the lower case and the board. i am pressing hard in this pic. Some foam suspension will be required, and I will clearance the case below the fan plug.