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I don't know anything about direct drive, but the only direct drive I know blew up a 144v Curtis (400 amp?) controller. It couldn't handle the higher amp draw. So, he made his own controller (hehe. he has helped me a whole bunch) and now it works just fine. It has a 600 amp current limit, though. That would not be terribly good on range of Lead Acid batteries. He uses Lithium Iron Phosphate, which don't care much about dumping absurd currents. So, to answer your Question #5, Heck ya you can! haha! You're ONLY a computer engineer? I'm a substitute teacher. I'm best at telling kids to shut up, and fantasizing about giving them a Karate Chop Sandwich with extra mayo, and mustard.
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