To gain access to the interior of the chassis simply remove the one thumb screw holding each panel in place. There are several plastic pins which keep the Aluminum sheet in place, thus no additional screws are required. The only active cooling of the PC-U6 has been placed on the side of the chassis, which means you have to make sure that the CPU cooler you use is not of the tower variety. There is a large opening in the mainboard tray for easy access to CPU cooler backplate, while two additional, covered holes should allow for basic cable routing.
The two fans are mounted on an Aluminum frame which in turn rests on rubber lined screws to kill any vibrations. It is equipped with dust filters on the intake side and grills on the outtake one. The entire unit is easily taken out by removing a single thumb screw
Even though there is no active cooling in the front, Lian Li has included a round dust filter, which seems to be the same part as what covers the rear expansion slots. The only difference is the fine filter used. Due to the circular shape, the hard drive bays are somewhat unique, with two embedded spots for 2.5 inch drives and three for 3.5 inch ones on the divider plate between mainboard compartment and PSU bay. The single ODD bay uses the same locking bar we have seen in many other high-end Lian Li enclosures, which should work quite well.
Turning our focus to the rear of the chassis, there is the afore mentioned PSU bay. It is quite restrictive, so you may not be able to install super long units here, but honestly there is no reason to do so in the first place. Above that are the four mainboard expansion bays, each protected by a separate cover which is held in place by thumb screws. The fan controller utilizes four 3-pin headers and you may also connect the LED strip here to dim the lights as well - pretty nifty.
There is a dust filter on the underside of the chassis as well, so that no dust can enter these areas of the chassis.
Before we dive into the assembly, let's take a quick look at the cables. While the interior of the chassis is black, Lian Li did not include case cabling of the same color, while the ones for I/O are all sleeved appropriately. It would have been nice to have all black cables as well, especially since both sides are semi-transparent.