I'm planning on getting a Fractal Design R5 case and adding a 3 in 2 HDD cage (Icey Dock or Istar) in the two 5.25  top drive enclosures.  Anyone have this case and is there any problem with doing this?  I want to use 11 drive (7 data 2 parity and 2 cache.)  Also, I'm leaning on getting the iStar Cage (iStarUSA BPN-DE230SS-BLUE 2 x 5.25" to 3 x 3.5" SAS / SATA Trayless Hot-Swap Cage) vs the Icy Dock (ICY DOCK FatCage MB153SP-B 3 x 3.5 Inch HDD in 2 x 5.25 Inch Bay Hot Swap SATA 6Gbps HDD Rack/ C