Sounds like you've figured it out, when/if you order those nuts, make sure you get the correct ones, midget and sprint take different sizes, your's should be 1/2", they just screw on what sticks thru the hub from your pins, then the rotor, with flat head bolts, bolts the rotor to the hub, might need to buy them at the same time. You can always use the other three holes in your hub face, depends on what size the holes are, some are threaded 3/8, some 7/16, some 1/2, depends on what the last guy did. Bob
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"Being old, isn't half as much fun, as getting there"! Ole Robert I! 
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