As I have previously owned a Mountain Mods case, I know how hard it is to do cable management correctly.
As this case is based on a MM design (very loosely) I realised that I had to put something in place to rectify this problem.
After some thought, I decided to put a false panel behind the motherboard tray.
Panel cut to size with an area cut out, to keep the rear of the CPU cool
To hold it in position, I used some 20mm U section aluminium
U section drilled & fitted with the good old rivet nuts
False panel marked out & drilled to match the U sections.
False panel bolted to U sections
The rear of the U section was then marked out
U section drilled
Motherboard panel drilled to attach U sections
U sections attached to motherboard tray with countersunk pop rivets
False panel fitted in place
Now I have a 25mm gap between the rear of the motherboard tray & the false panel to hide all my cables.