i'm pretty sure it doesn't matter what filter you use in these modern times anymore. or a filter at all for that matter. what are you filtering, really? if your engine is clean then what are you gonna filter out? some .000001 micron - soot?
also, it's too simple to make a good filter. any indian can do it according to bosch. if you are able to make a crap one you'll be kicked out of the market soon enough I'd say.
that cotton story seems to stick. how would cotton threads ever get any further than the filter is a mystery to me, or how they could do any damage to the engine anyway, (scratching cylinder walls with cotton?) but app. the turkish made fram is the way to go..