hey giantswan do not be disheartened for
MGMAT quant is far tougher than the real thing. I scored 48Q in my actual GMAT and consistently score around the 49 mark in gmat prep. Last week I took my first
MGMAT and my quant score went down to 46 - an unheard of score for me. That test was really tough; much tougher than the real thing.
A 630 in
MGMAT will equate to a 660 in the real thing.
Having said that, if you are aiming at 700, I'd suggest you get the
MGMAT quant books (all of them) and solve the problems from the book and the related OG guide problems. These will get you some terrific focused practice. Do not ignore anything, in fact cover all the basics - algebra, word problems, geometry, inequalities etc.
Also, I think you have plenty of scope for improvement in verbal - in fact if you can push your consistent mid 30s verbal score to 40, you'd get a 700 score pretty easily.
Good luck.