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I would stay away from an 8" hand drill of any kind unless you are putting a (powerful) cordless drill on it. Its almost twice as much ice to remove (64/36) as a 6" drill. I started ice fishing 50 years ago with an old segmented spoon type 8" drill, and probably would have given it up quickly if I didn't graduate to an old one armed Jiffy after a couple of years. Once I got a 6" mora, the Jiffy stayed home (except on Champlain, where you are still allowed 15 tip ups). Nowdays I use a 6" lazer with a cordless drill.
As I've gotten older (78) I've enjoyed a StrikeMaster Lazer 5" for the last 6 years that's still on the original set of blades. After years with a blue mora, life is a lot more fun on the ice now.I will say it's one of my wiser investments.