Being an ASF board that would mean it is a 4x2 series of fets...there are two more on the opposite side of the board that's facing you.
There's no harm in stacking fets in my opinion. The stack would allow you to run a stock motor with great efficiency....
I looked back at the first page to view your collection and I have to say I'm impressed. A couple of those ASC's would be dreamy to own but I'd just wreck them (since I believe firmly in "run what you own").