Having delt with a pci-e flex risers problem with interference, I've decided to use a short PCB riser and relocate the graphics card to the bottom of the chassis. I'm using 3/8" rubber feet and placing vents in the chassis bottom for the graphics card to draw air from. The drives are then located above the graphics card which makes them easier to access. Unfortunatly that area can get pretty toasty. To help with that heat, the side vents will be pushed towards the top rear. The air drawn in by the PSU fans will enter there. These changes moved the graphics card over about 0.5" allowing room for the pci-e power connectors so the chassis will not have to be made wider after all. The harddrive mount can now make use of the motherboard partition as one of it's mounts. I'll bend a bracket for the other side. The pci-e short riser is also $30 less expencive then the flex riser.