Although I don't personally care for the thought of one piece of hardware suspending the entire top, that does sound like a better plan than your first idea.
Another reason that I prefer distributing the load is not only because it lessens the stress on the hardware, brackets, ropes, straps, etc... but is also so that stress on the hard-top itself is minimized. Make sure that when you hoist it up, that you aren't causing undue amount of flex or strain on any one location of the hard-top. Stress fractures, fatigue, and warping isn't always immediately visible so just make sure that if you need to make adjustments or possibly use some foam or rubber padding to minimize these hazards, that you do so.
Hard-tops are expensive to replace so just make damned sure that everything is secure and able to safely suspend the top for an extended amount of time.
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