My old one at it's tidiest, may give you ideas, who knows. 
Hard drive caddy removed, hard drives suspended and reverse mounted in optical bays, lots of cable management holes, and I gutted an old PSU and used the case from it to stash cables inside.

Hard drive caddy removed, hard drives suspended and reverse mounted in optical bays, lots of cable management holes, and I gutted an old PSU and used the case from it to stash cables inside.

