Those front drive bays
Sadly, the answer to the question on the previous page is a resounding, earth-shaking "no." Allow us to demonstrate.
The Raven organizes its six front 3.5" bays into two groups of three. A pair of 120-mm fan brackets holds each group together. To free one of those groups, one must first remove three drive bay covers at the front.
One must then, on the left side, undo two screws that hold the rear fan bracket in place and another two screws that steady the top and bottom drive trays. (I've taken the liberty of highlighting the screws that must be removed in red.) After that, one needs to pull three of those plastic clips into their unlocked positions.
There's more. On the right side of the case, one must first remove one of the drive trays by unfastening four screws...
...then remove an additional four screws. Just like on the other side, two screws hold up the rear fan bracket, and another two screws keep the top and bottom drive trays in place.
The drive trays are finally free. Now, time to pry off the two fan brackets, attach hard drive(s) using four screws each, and then repeat the aforementioned procedure in reverse to put everything back together. No, I'm not making this up. This procedure is straight out of the manual, and I see no simpler way to go about it.
As if accessing the front bays weren't a big enough problem, airflow to them seems like it might be in short supply. While the Raven's main compartment is very well ventilated, none of the stock fans blow air in the direction of the front bays. Silverstone admittedly lets users sandwich each group of three drive trays between 120-mm fans, and it even allows users to remove the solid plastic bezels from the bay covers, like so:
However, out of the box, the Raven RV03 seems to provide next to no direct ventilation to any of its drive bays. Users are expected to supply their own fans and take care of that themselves. We'll see in our testing whether this design has a material impact on temperatures, but it certainly doesn't bode well.
Evidently, the Raven RV03's drive bay design is either a complete afterthought or the product of a puritanical mind terrified at the prospect of users loading up hard drives full of rock music and ripped Harry Potter movies. In either case, the Raven RV03 comes out looking exceedingly old-fashioned when most other enthusiast enclosures have tool-less drive bays with easily removable trays and plentiful ventilation.