So my Mac Pro RAID enclosure project is almost complete, just working through the last few steps. Specifically, I need a solution for mounting the 2x 5 Bay backplanes to the bottom of the "shelve" where the Optical Drive(s) and PSU is typically mounted. I have 2 of these: http://www.newegg.com/Product/Product.aspx?Item=N82E16816215001 sitting freely on the floor of my Mac Pro case and I want to mount them to the underside of the shelve that generally houses the optical drives and PSU in a MP. Ideally, I will find something that can swivel so I can turn the backplanes 360 degrees when the side door of the case is removed. Any ideas?