I saw that one but it had two things that I noticed, particularly if you're going to run dual 5000 mAh batteries. It seems like it's capacity is a little low for dual 5000s (8000 mAh spec'd). Also, if you're running two batteries wouldn't that be a 12-cell battery (977 spec'd to charge 1-8 cells)? Or, because you're running 2x 6-cell batteries in parallel it just looks like one big 6-cell battery to the charger?
Specs pulled from here: [link=http://www.modelrectifier.com/resources/batterychargers/charger%20features_03_07.pdf]MRC Super Brain Charger Features[/link]
I like the dual battery charge setup, though.