Thanks for the compliment
I don't but I might do if I have time.
Yeah but that also means that if there is dust ON the box there probably is twice as much inside already.
Dust builds up on the net curtain. The curtains are surprinsingly fine, even finer than mosquito nets, a bit like unstretched women's tights. It is inevitable that a small amount of dust should find its way in, but we are talking about the really microscopic particles. But let's not forget that there exist forces between particles (e.g. electrostatic, gravitational, etc) which make dust stick to the curtain instead. In summary, the net curtain keeps most of the dust out.
I already do!--I keep my house very clean and I don't have any pets. Every house is different yet dust sucks equally in all houses, therefore every house sucks differently. In my house, no matter how much I clean, dust reappears, and there is nothing I can do. Cleaning helps but does not eradicate the problem, so I bought the net curtains. Then I give the curtains a shake every week.
Ideally all computers should have some sort of EXTERNAL heat radiator as found in water-cooled systems; the case could then be virtually airtight and no dust would be able to get in. Incidentally, there are no signs of the MacPro case itself acting as a heatsink which is a real shame as it is made of aluminium.