My C137-based vdr-barebone:

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The Casetronic-C137 case does not support the displayed configuration "out-of-the-box" - i made some mechanical changes at the case:

• moved the switching-supply (invisible) below the DVD-holder, it's held in place by 3 screws (does only work for the power-supplies for P3-boards)
• removed the metal-stripe holding the power supply to make place for the 3 1/2inch hard disk which is hold by 2 screws through the bottom of the case
• moved the fan from the left to the displayed position for better air-flow (needs to be replaced by a Papst-fan)
• replaced the original Int'l-Fan (would'nt fit because of the DVD-holder anyway) by a 60mm-11dBA-Papst-Fan (unhearable).
• some fiddling with the optional TVout-Module (chip is supported)
• placed a transparent plastic stripe to direct the airflow from the dvb-card to the fan, as well as one stripe closing some of the holes in the top of the case to optimize the card-cooling
• currently one dvb-card and one bttv-card is installed, although there would fit 2 dvb-cards (the lower card has only 2mm space between the tuner and the harddisk case)
• the motherboard (BN815A) supports P3's up to 12x133MHz+512MB-RAM, it has USB, Firwire, i810-grafics ("3D"+Xv+MC works), sound (ACL201-codec), serial, parallel, ps2-mouse&keyboard and 2*UDMA & floppy-controller onboard.
• the external power-supply has 90W (120W availabel too) and becomes only hands-warm (cpu-temp goes up to 50°C, system 40°C, DVB-cards are not to hot to touch)
• the harddisk (Samsung SP1604N, 5400rpm's, 160GB, 44MB/sec) is unhearable silent, you need to place the ear on top of it's case to hear it spin!
• BTW - the box is happily running Gentoo-Linux ;-)