What appears on the desktop - incase you're wondering. Installing more than four large desktop drives in the MP without a drive kit. The bottom drives are actually sitting on very thin black fibreglass PCB (all copper been etched off), it's just there to prevent conductivity to the chassis. All in all, it does get a little warmer, typically about 45~52°C (unloaded/loaded). Side view.. BTW: optical bay still has a optical disc drive in there. there's a 1TB 3.5" drive in Optical bay 2. ODD_SATA1 & 2 are still unused - future expansion with 2.5" drives. Seriously, Apple should consider making a LARGER TOWER How about another four additional bays? It'll be really helpful!