Well as I cannot work out how to add pictures to my own comments, I have created a new post for the comparison pics of the 2 5.25 drives.
The darker...
Well, the slot loader doesn't fit with the metal support from the checkmate case, and so doesn't line up. In future I may make a support for it, but...
well touch wood all still working but I did ask Jens about whether it was better to power the RR from the PSU or Motherboard, however his answer was...