One thing to note, is that if you want to remove the glass panel, the lower thumb screws also hold the stand in place. Removing them with the case standing will cause it to bend the stand and lean over (it did no permanent damage to the stand)
There are an additional three (3) screws that hold the stand on the back of the case
There are four (4) small thumb screws that hold the back side panel on. There is also an included dust filter for the optional fan spot.
The four (4) thumbscrews on the back panel can be replaced with feet and screws, to have the case in a desktop style orientation.
There are two (2) keyholes for hanging the chassis on the wall, should you choose.
There is (mostly) 35mm of space between the motherboard tray and the back side panel; enough space to comfortably run wires.
The top panel section is removable by removing four (4) screws.
The PC-O5s came preinstalled with a pair of 120mm fans in the top.
There are six (6) screws that hold the fan mount to the top panel. There is also a removable dust filter that covers the 120mm fans. The frame of the dust filter is metal, and quite sturdy.