The interior panels in a supercab are anything but "Brittle"
Frankly I suspect you'll be disappointed with the effect of the pop-out
quarter windows, I know I was...
They never did seem to do much for ventilation.
(The Popup sunroof from an Eddie Bauer Bronco2 had FAR more effect)
and it was great if you want to hear every bit of road noise, tire hiss
and each piece of gravel stuck in the treads of your tires, but....
Since Installing mine back about ten years ago I don't think I've actually
opened them more than a dozen times, not nearly as often as I open my
sunroof, and I can't even recall opening them once while driving since I
reinstalled the A/C in my truck.
AD