RasPi and disk frames for Cobalt RAQ 3 case

I have an old Cobalt RAQ 3 rack enclosure lying around which is still almost complete with power supply, front panel and fans. It would be good case for a media center, e.g. with a RasPi and an external hard disk.

So I designed two frames / holders suitable for the Cobalt RAQ 3, one for the RasPi and one for a 2.5" disk (to be mounted in the Cobalt disk frame). The RasPi is attached to the holder with self-tapping screws. On the lower right there are spacers for an additional board (simply dr