nicozeg,
I don't use CAD software really. I use Microsoft Visio 2k. I use it so much at work it's like second nature to me and I've been doing orthographic drawings since I was 6 years old.
JFetting,
Yeah, I am going to hack up the cover of the old one as that's the only place that this will protrude. I will probably use the power connectors off the dead one too, as I will be making custom cables just for this system configuration.
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More to follow later tonight... gonna go eat supper now.