Dumb res/rad idea?

[SticKx911]

I'm looking to add a passive radiator to my loop. Mostly just to increase volume and possibly aid in temps. I'm running a dual 140mm in a lian-li lancool, and I was wondering if there are any good passive coolers that can fit in a 3.5 drive slot. For now, temps are all healthy, but I plan on upgrading my video card later this month and would like to be set to go when that day comes. any ideas welcome.

case:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811112239

as set up:

yep, I know I need better cable management skills.
EDIT: had to change the pic the other was WAY huge. lol

 

[SticKx911]

just sub'ing my own thread in case of reply.

 

[xx-Thor-xx]

If I was going to add a passive rad I would put it outside the case, most likely hang it off of the exhaust fan.