It's been a long long time since my last update, sorry about that. At this point the cabinet is nearly finished, missing only the power socket, a better bezel and the art (which is probably a lot of trouble).
So to catch up, let me post a few pictures of the building process and how it is turning out:
I got a cheap old Athlon XP CPU and disassembled it to use in the cab. First I installed the motherboard by screwing it to the side panel and used standard plastic motherboard spacers to avoid direct contact to the MDF. Then the HDD and power supply unit I just used L-shaped holders to attach them securely.
I also disassembled a regular PC speaker and attached the amplifier just over the back door so I can have access to the volume and also replaced the speakers to larger ones and installed them on the top.
Everything seems fine and secure.
On the top, I installed the marquee holders and the two plexiglass sheets. Since the plexiglass sheets were fairly think, I had to find larger holders so I could screw it secure. I ended up finding plastic (rather then the usual aluminum L holders) the were big enough. Also the speaker grills I used are actually meant for cars, I think. Anyway, I like them.
The I added 3 USB ports in the front, below the control panel by attaching a small USB hub. This one was tricky as I had to go back and forth with a chisel to cut the square holes in the MDF just right, it took me several hours really. Also to secure it I shaped a L-shaped holder to hold it down. This worked great.
On the next post, the first boot, the bezel construction and testing it all.