Originally Posted by Wavelength
"Bolting" sounds a lot cleaner than "screwing". Gotta be family-friendly down here!
HAHA! You could also say, "If you have stuff bolted to your drums, you've screwed them up!"
Back to the vent hole, it might look cool if it were trimmed out too, like a Holz bass drum ring but curved for your drum. Maybe it is and I can't tell.