Thanks for all the interest guys
Thought I'd show some more shots of the model and see if it gives any answers to all the questions
Here's a better view of the motherboard, in relation to the PSU's as the desk is symmetrical, welcome to my nightmare, when they make a symmetrical motherboard I WILL BUY IT :O
But you can see the area where the reservoir and pump will go I haven't modelled them as I found I got a bit too accurate with the old modelling, if anyone needs a 3d model of a SR-1 360 rad....
or a 25mm fan shroud...
The panels either side of the motherboard tray will have the pump and reservoir mounted on them and they also lift out
The tubing to the Radiators will be routed through the dividing/PSU vent panel,either with grommets or a bulkhead fitting/ quick disconnect (depending on how much money I have for fittings
And here you can see the base cover and fans
And here is the rear panel, without the hole cut for the back panel, as it still is in real life, and a shot of the underside looking through the cover.
I didn't want anything out the back initially because it was going to be up against the wall, so the back panel would have been further into the case but then I ended up with a slightly (free) different piece of glass for the top which so I changed the design so I can mount a triple monitor stand directly onto the rear of the desk so any wires escaping the desk in the centre at the back will most likely interfere with the mounting points for this, I thought of a few way similar to The_Chemist21 but most of them got complicated with getting the wires out and back in, or having to chew a hole through the box section which would leave it weak at the attachment for the screens and I didn't want cables running in the open on the back etc... so to stop myself obsessing over the problem, I went with the classic solution, run them under the gfx cards and straight through the MB tray.
I also figured that I have to have the wires for the GFX cards on display too so if I just made all the PSU cables look decent then I'd be onto a winner.
Anyhoo, let me know what you think, there may still be time for a better solution.
Hopefully tomorrow or Tuesday I might be able so show you guys some of these shots with the real deal, If I trawl my way through 10 more brackets and make the bits of angle you can see on the underside of the trays
If I missed anything or you want to see a different view of the model let me know and I'll put it up