Just bumped into this thing on the internet. It's a 3d printed 16mm spacer that lets you use cpu coolers up to 64mm instead of 48mm. Good thing that you'll still be able to use the original side panel. Well.. this makes the case around 8.1 liters though.
www.thingiverse.com
Thingiverse - The community for Open Hardware
Thingiverse - The community for Open Hardware