I think Allen Klein might not have been referring to me when he said that but I do seem to like creating boxes for my toys.
Ultrabay, these are a way to easily swap optical and hard drives drives. They allow me to carry around additional storage and, providing I remembered to pack the drive, access optical media.
Lenovo used to sell docking stations with multiple Ultrabays but since Series 3 was introduced this is no longer the case as the docks have been reduced to port replicators.
Recently after another close call I decided what I needed was a proper external enclosure to house all my drives. After some extensive googling I found nothing suitable ready to buy. Most normal people would give up at this point, I appear to be an abnormal person so I got the CAD package out.
The design was slightly evolved to accommodate the features of some older caddies and allow a pencil to be used to eject the drives (I put a square hole in the back)
The completed unit uses about £10 of plastic and takes 30 minutes to lasercut.
As usual all the design files are publicly available from my design repo.