Perfect. Sounds like it's about the length of a 2.5 inch hard drive, but not quite as wide, so it might be possible to mount one on a carrier that could be mounted like a 2.5 inch drive... I have plans.
That port multiplier board... any chance you have measurements for it? thinking about ordering one to use with the cubieboard 2 (arm sbc similar to the pc-duino) but would like measurements to see what kind of space I'd be dealing with.