Buzzhead, I'm not positive, but I think Joe's Gold Nugget is label leverage or close to it.
Mine is drilled similiar to label leverage also, except the CG rather than in the palm is kicked out 1" from the center grip line. Like yours, mine is also very versatile. Unless the heads are void of any oil at all, I can play mine from light oil to medium plus (medium heavy?) in the box finish. I'm sure it would play heavier using a scotchbrite pad, but I haven't had any oil that heavy and seldom do where I bowl.
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Don't wear your self out cutting wood with an axe...Use a Buzzsaw