Here's my current set up, thought I'd post while I just got it nice and clean. It's a Third Degree stemline (18 pin-holes) with worked section, with splashguard and ice pinch, along with a Third Degree ashcatcher to fit the style, with an 8-hole diffuser and matching bowl. [ame=http://www.youtube.com/watch?v=zPs5oeS92Vw]New ashcatcher - YouTube[/ame]
Noticeable, yeah, but considering the stemline is damn near zero-drag, it's very tolerable especially with ash-catcher like water levels. If you intend to use it as a serious water-filtration chamber and fill it well above the holes, you can expect a chug.