If you don't trust yourself with a 7" brace height bow, then you shouldn't be entirely comfortable shooting such a short a.t.a. speed demon like the MM!!!
I definitely agree with this statement of Jason's. Seven inches is the generally accepted minimal length for shootable brace height on any given bow...and with the average shooter. It would not concern me too much though I thought it worthy of being mentioned in my previous post.
However, I am one of those folks that puts more stock in brace height rather than axle to axle length as my current bow harem shows...