First test and the outlet on the GPU leaked, I couldn't tell exactly where all the water went but it was potentially into the PCIe extension slot and also between the graphics card and its water block - this is why we test water flow without power to the motherboard or graphics card!
I fixed the leaking joint and dried everything I could reach, then I dried again using a hair dryer and left in a warm room for 24 hours.
Finally I powered up again and had a leak free system.
You may also notice that I replaced the black CPU block with a perspex version, the original plan was for the colour scheme to be black, silver, and white, so that all colour could be added via the coolant and lighting (which can all be adjusted without changing hardware). I originally thought the black CPU block would be neutral, but once I saw it in place it was obvious it wasn't working, and also the perspex block lets me see air bubbles which I couldn't see with the black CPU block.
I think the perspex block looks much better...
One comment about the RGB, after working the first day all the RGB suddenly died, nothing brought it to life until I installed the Asus Aura software (as soon as I rebooted after this the RGB suddenly sprang back to life), from discussions on the WEB this is not too unusual and the Aura software seems able to reset the motherboard RGB.
Fans, GPU and motherboard are all RGB, but I also have the Bitfenix LED (white) strip to light inside the case, currently, this is located on the left-hand pillar (as you look from the front). I wanted the option to turn this interior lighting on or off as required, so I fitted a concealed switch on the base of the case as shown here.
So here is the finished system...
The beauty of this neutral colour scheme is that I can change the colour just via the RGB...
For those interested in temperatures, the GPU runs in the low 40's C under full load, my CPU is not so accommodating, I guess I have a fairly average pick in the silicon lottery, using the Asus "AI Overclocking" gives me all cores at 5GHz and 2 of the cores peak at 83C (recommendation is to keep all cores below 85C). I expect I could push this to at least 5.1GHz with some more aggressive fans, but that isn't really the aim of this build.