THE CORE V21 INTERIOR
Removing the left side panel is enough to work on the interior but things can get even easier since you can also remove the top panel (and the remaining two of course).
The first thing you'll notice once you remove the top panel are these 4 aluminum rails which can be used to mount two 280mm radiators, four 140mm fans or six 120mm fans.
Three removable 2.5" drive trays can be seen once you remove the right side panel.
In terms of quality these are nothing special but they are quite sturdy.
A rather massive 200mm fan is placed at the front and as expected you can replace it either by a 240/280mm radiator or two 120/140mm fans.
The interior of the fascia has a numbering system which is probably used to indicate the factory rollout date of the Core V21.
If you decide to change the orientation of the mainboard tray you can also move the I/O.
Three extra drive trays are placed right beneath the mainboard tray and can accommodate both 2.5" and 3.5" drives.
These are not as sturdy as the vertical removable ones but since they go into a removable drive cage they don't have to be.
The mainboard tray is actually quite larger than it needs to be and the long cutout on the right should help quite a bit with cable management.
All 5 PCI expansion slots are secured in place via normal screws and feature a nice plastic dust cap.