hello, i own the RF7 and RC64 version 2. i got an offer to exchange it for the RF7 and RC64 version 3. question 1: i am very satisfied with my current setup, are the differences very big so is it worth to upgrade to version 3? question 2: is there a difference in dimensions between the two RF7 (without the foot!) I can't find that anywhere. question 3: the dimensions of the RC64 are the same apart from the depth, right? Thank you