I'm continually upgrading my drives to larger drives. While in the time being that is fine, but my disk space usage is also increasing. Rather than replacing my 2TB drives in a year for 4TB drives (or whatever size they may be), I'd love to add more drives. Right now I have my 'backup' drives in an 8-bay SansDigital eSATA cage. This is fine for backups, but for simplicity and drive speed sake, I'd love to just add more drives to my machine. I'm using up all 5 available SATA ports on my 2010 MP. I don't use the Optical drive much, so got to thinking: what about putting my optical drive into an external firewire/USB housing and plug it in when I need to use it. This would free up one extra drive port, which would suffice for the next 2 years or so. So, are they are good external casing's that will allow me to use my current MP SATA optical drive? Is this method bootable, what pitfalls might I run into? Thanks in advance.