Although 900 D is a big case , but subdivision too cramped. U1 One small problem of the case is mounting of the PSU and and work on them. U2 Only the bottompart of the Rad mounting plate (at back side)is portable. upper part is fixed.can not be romoved. U4 To be a little more comfortable in the PSU mounting and mounting of PSU connectors , I made a mounting plate to install PSU. As I was accustomed from SilverStone TJ 07. Cosmos II U7 U13- U14 I cut the mounting location of PSU. U6 Made a mounting plate from 2mm thick alu. U8 So that, I can mount PSU without tilting and wriggling… U15 U9 And ı cann take out the PSU without disassembling back rad. PSU with mounting plate U10 Pushing the PSU in the case ,backplate with PSU , mounted to the case with four self-tapping screws. U11 I'm pulling out the PSU and can mount easily PSU connectors. With adding a frame from 10x15 mm box profile to the backplate , can I mount , an additional 360mm rad to the bottom part of the case ,if it is necessary. Mounting plate sent to powder coating.