And I think the QR Hub would be a harder, after the build, accessory to add, compared to something like a bigger fan, or the primary shielding and venting. Some guys take the approach of
"if it's not a huge PITA to put it on later, then I'll just move it lower on the list today, but if it's a real bitc* to add later, or there is a significant stranded cost in doing so, then I'll move it up higher on the list for installation today." A perfect example of that is six pins versus five. Changing that over later is much more expensive than doing it up front. A top and side curtains, however, are going to cost pretty much the same whether you do it now or later. Of course, you should try to avoid significant stranded costs during your build as they are difficult to recoup. Here are a couple of pics of the QR hub.
