Hi,
The Build - Part One !
Start at the bottom . . .
In order to get even more into the case I decided to move the DC-ATX PSU to a position on the Left Front (View from rear) and mount the AC-DC PSU above it on a custom aluminium mounting platform based on the standard HDD mounting trays.
Drill and tap 2 new mounting holes (could have used through screws and nuts (I have added 10x M3x10mm Stainless Steel cup head Philips screws to the parts list for my mods - There are plenty of M3 Self-Locking SS Nuts provided)
New mounting position uses frontward 2 of the existing mounting holes.

Test mount the DC-ATX PSU - I reverse it later (rotate 180) for better wiring position.

16 Gauge aluminium platform for AC-DC PSU mounted on the provided standard 40mm brass posts

Test fit the AC-DC PSU - Looks OK, but platform is too big so I will cut it down to size and re-paint a bit later.

Motherboard mounting posts (5mm socket)

Underside with the feet added (Aluminium blocks with rubber inserts - Nice)
SS Ny-lock nuts on the posts.
Attach the Left Case Side - Very solid, cast and machined, aluminium heatsink.
Lots of lovely air holes and heat pipe locking plate holes.

As per instructions add the Front Panel hinge mount to the Left Side of the case.
Pretty - Heatpipe grooves machined into side panel.

Mount the Asus Z97A-USB3.1 Motherboard
(What ?? That is not the Motherboard listed above ?)
This is not my final board as I am shortly about to discover an issue with the Asus board !

Assume all good with Asus and i5-5675C . . . Full steam ahead.
Pop in CPU and mount Heatsink and Heatpipes.
Looks so pretty

Mount up the DC-ATX PSU board and cable in

Connect and then mount up AC-DC PSU over DC-ATX unit.
Note the platform(s) have been re-sized.
Right-hand platform fitted on 30mm posts as a test

Move to TV and attach HDMI and Power leads. Attach old keyboard via PS2 socket.
Attach Mouse via USB.
Power ON . . .
Boots (apparently) but no output to TV ?
Error LED on GPU PCIe x16 Slot 1 ??
Strange and annoying ???
No HDMI, DVI or VGA output from onboard graphics.
Contact SCAN (UK MB supplier) - They suggest adding GPU card to test and also suggest I may have bent the pins on the MB when fitting CPU, and that this is the problem as there should definitely be HDMI/VGA/DVI output.
SCAN - Only had 3 returns for DOA Asus Z87-A/USB3.1 from ~200 sales - 2x Bent CPU Pins, 1x faulty.
Add one to the Faulty List.
Add old 8800GTX card and boots fine.
Try a few times resetting CMOS and stting BIOS to Onboard Graphics . . .
BIOS always resets to PCIe Graphics on Re-Boot.
Google search finds 3 other people with similarly misbehaving Asus Z97-A motherboards.
No resolution is posted.
While I have the computer working, albeit with an unwanted graphics card fitted, I try out the Samsung 950 SSD mounted in the Asus Ultra M.2 PCIe x4 add-on card.
BIOS fails to detect HDD. Windows 8.1 install fails to find HDD as expected.
Try all settings found online to make Asus MB detect M.2 card but to no avail.
Apparently Win 8.1 requires install from UEFI USB.
Create UEFI USB version of 8.1
Fails to find M.2 HDD - Apparently system must be entirely UEFI (No legacy) and the trusty old (working) 8800GTX is definitely not UEFI.
Ultra M.2 board going back to OC UK !
This Asus board probably wont do what I want even if I get it working.
Contact SCAN - Solution - Have to send back for repair or replacement.
Ill ask for a refund.
(Motherboard did test faulty and I have now got a refund from Scan)
Remove everything needed in order to extricate the Motherboard . . .
Look - No bent pins !

Pack up the motherboard and off it goes to SCAN.

It arrives back at SCAN pretty quickly.
Expect refund soon as SCAN have always been very good in all my previous dealings.
In the meantime I ordered an ASRock Z97 Extreme6/3.1 from Amazon-UK (last place available at reasonable price and not from mainland EU).
The ASRock board arrived before the Asus had landed back with SCAN.
My HD-Plex H5 Silent Case build will continue after the break
. . .