Coolermaster HAF stacker quick questions

Teknicians I need help.

I'm building a decent PC, and need a little help in terms of the case, the HAF stacker really appleaded to me but few things about I need cleared up.

I'll be picking up an additional HAF91F to give me two915s, one 935 and stack them like this,

The top 915 is gonna be a rad box, (which im hoping to mod to hold 2x480 rads all things going well)
but the second 915 is where this thread stems from, I'm hoping to dump at least drives in there, and I'm wondering will I be able to fit fans on the sides of the case with the HDDs installed, becuase I really, REALLY wouldn't like how it would look with just fans on the top 915. (also hoping to squeeze a watercooling pump in this bottom 915 if the space allows it).

Thank you.

I'm no expert on water cooling but you may need more than one pump if you're going to have them all the way in the bottom pumpin up to rads in the top, hopefully someone else that actually knows can chime in. As for the fans, I dont think there should be an issue, maybe try looking for some reviews on youtube that do a tear down or go really in depth. Considering that you are considering modding the top 915 I don't think it would be too difficult to mod the bottom to fit the drives if there isn't clearance to begin with.