I'm sure Mike has done plenty of testing to ensure the updated design is strong and secure. There is a thread somewhere where he explains the concept of the design and how it is as strong or stronger than the original.
I wouldn't be concerned about it, it's his job to make RCM stuff solid, and he hasn't let us down yet!
EDIT: Here is the thread, from when the updated mount design was used in the Ten-T mount, starts about halfway down and continues with another post on page 14:
http://www.rc-monster.com/forum/show...=25583&page=13