With the abundance of thumbscrews installation is easy and straightforward, while there are screws to be tightened with a screwdriver, they are in easily accessible places. It starts with the power supply, first you remove the bracket which is held in place by four thumbscrews, then you screw that bracket to your PSU and slide in the PSU, then re-screw the thumbscrews in place and you’re done.
The PC-7 SE-B III will have no problem fitting the largest power supplies, as you have most of the length of the case available.
Next up it’s time for the CD/DVD-rom drive, this one needs to be screwed tight, first you remove the front panel, which gives you access to the 5.25” bay covers, they are not held in place by screws and be easily removed and reinstalled as needed.
The hard drive bay is a custom design; it can hold a total of 3 drives, although its size would lead you to believe that you can fit 4. The reason for the -1 is the rubber mounting ring method, not hard to explain, you screw these 4 custom rings onto the hard drive,
And then you slide the hard drive in the bay and push it down a bit for a good fit. If you plan to move the case around a lot, you can secure the HDDs with 2 extra screws at the side.
After installing the motherboard standoffs you install the board and PCIe/PCI cards. Then you replace the side fan bracket, and you’re done.