Thought I would take an angle shot of the fan that keeps the 5 spinners in the enclosure cool. Sill debating installing a pull fan on the other side knowing that a huge intake fan will be blowing right up against those spinners anyway.

Thought I would test my idea with a Barracuda 2TB XT drive. These drives were developed for servers and commercial use. I haven't been able to get much clarity on whether they're CMR or SMR and there is conflicting information concerning these drives online. I'm guessing the older ones are indeed CMR, having a 64MB cache and more specifically deigned for servers although they are not Enterprise drives. IF anyone happens to know for a fact whether they are CMR or SMR please let me know. At any rate I hope to be replacing the XT with an Iron Wolf at some point.
I own two of these Barracuda XT drives, barely used and I'm considering using them in a RAID configuration in the X299 build. They are faster than the Iron Wolf I ordered but the 4TB Iron Wolf will not be in a RAID array. For me, it will be an experimental drive. At least it will be CMR for sure.

This is an example of my internal cable management. I realize it looks pretty sloppy but there is a madness to this method. I can access everything quite easily when the door is open when the door is closed only the RAM fans and the cooler with all the nifty blue lighting show. This affords me the benefits of both practicality and esthetics regardless of what it may appear to be once the door is open. Hiding these cables will only make the job that much more difficult when I need to access them. This is not a typical build. There are over two dozen drives in this PC.
That doesn't mean I can't enjoy my own version of RGB as illustrated here. You've already seen the blue. Here's the red and green. On my work station that AA means "all systems go" everything checks. Provided that I leave the shroud off the door fan I can actually read the Q code logger without even opening the door simply by reading it through the blades of the fan, which is remarkably easy to do. I haven't yet decided on whether I want to make use of that extra USB 2.0 header. This PC has an incredible amount of USB connectivity, which is a good thing for a work station.
It is a shame that I cannot use Thunderbolt in this build as the optimum placing for my graphics card completely covers PCIe slot where Thunderbolt has to be. The system will not see the card unless it is in Slot #2 which is completely blocked by the graphics card. I can move the graphics card but then this will compromise the performance of the card so no matter what I do with it there is a trade off. The X299 has a similar problem but I can place the graphics card in different slots on that board without penalty. A riser cable will result in compromised performance and plus it just looks ugly. I'd rather take my chances with the X299 build.