Final build
So here's the roughed in Ver. 3.0 of the loop.... looks to be clear of everything (especially the vid card). There's a couple of long runs in it... between a couple of short cable cuts I've made, the long runs, and the fact that this is the third version of the loop, I'm glad I ordered a bit extra when I grabbed the tubing.

One thing worth noting... Mayhems might claim to be non-staining, but that's clearly not the case. (Run it long enough and I'm assuming I won't need to add dye as it'll be coloured tubing...
I've still got a few RGB parts inbound, and I may decide to rethink how I've got my fans grouped, but that's pretty much the end of my cable management. Fan sets have been bundled together in their own harnesses, and everything fits relatively neatly against the back wall and under the drive/wire management plate. Commander Pro, & Hue+ are attached to the plate (cables are loose back there so that both can be easily detached) while the Corsair RGB hub is velcro'd to the back wall. The Lian-Li PWM controller (Rad fans) is attached to the top of the PSU (should have velcro'd it there, but that can wait until I need to remove it for some reason) and the Silverstone PWM (front fan group) is at the bottom of the case under the pump.
Quick view of the completed case w/o any of the case sides on. Aside from being necessary to prevent issues fitting in the vid card, an added benefit to the new loop is that it has room for my CM vid card droop stand.
There's the mandatory outside pic of the case with the tempered glass panel on. That's obviously not much use to anybody....
Since it's damn near impossible to get a good picture of the insides of a tempered glass case, here's the completed build with the panels on, but no glass.
And finally... the bling! :

funky:
Really happy with how this turned out. Couple of blips on the road (not accounting for the length of my vid card being the biggest), but this should hold me off for at least a year or so before I decide that I've got to try my hand at a rigid tube build.
If nothing else, it's got me off of the bay res train which has been limiting my choice of cases for quite some time.
And as always... thanks for looking!