Gates = a huge PIA.
That said, on the current system for the TS, Jointer, and Planer I have some that are kind of a pot metal body, and have an aluminum slider. It keeps moving in all weather. Some plasticy ones I tried at first would get all gummed up, and not open, or close well at all. The metal ones rattle like a haunted house, and I suppose some of that is leakage, but close 2 and open one, and the open open drains like it's supposed to. So if I could quite them up, oh well, with the tool, and the DC running it's a ear protection kind of environment anyhow. LOUD ROARING....
Hmmm thinking about it DC is a huge PIA, but it's better than not breathing. :-)