I do apologise in advance for not reading the links you posted, but I can speak from experience that the 'sock' type filter is very effective.
I used one in my Torana for many years and cleaned the sock every 6months or so - constantly removing crud! It prevents the radiator from receiving any of it (so no blockages).
Cheers
Keithy


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...different story.. at one stage I was using surplus panty hose 

to catch golf ball size bits and pieces ...well maybe not quite golf ball size



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