No, I can confirm the 3.5 in drive cage works with the NH-C14 + X99e ITX + Ncase M1 V4. The cage doesn't even touch the cooler (tips of the heatpipes line up perfectly with drive cage's holes). There's about 2mm from the drive mounting thumbscrew to the fins.
But if you want to mount a second...
Has anyone noticed that this monitor has automatic brightness adjustment?
When viewing a mostly black image the monitor decreases brightness, and when viewing pure white the monitor increases the brightness.
This is a deal breaker for me. Is there a way to disable it?
I managed to get the Swiftech Apogee Drive II to fit on this motherboard using the included CPU bracket. It works well. Block is very secure.
I used parts #91290A083 and #90377A142 from McMaster-Carr. I have a lot of extras, PM me if you want one.