Originally Posted by bbqgeekess
I put sliding vents on mine
The way I did it myself was placed it, put one dot through drill hole with sharpie onto the drum for first screw. Drilled that out. Then screwed that one in holding the vent somewhat in place. Then I mark the second hole.. unscrew it all, drill it put it back on.. screw both screws in and mark the next one, and so forth, until all done. Then I drilled the hole through my vent and drum with the vent in place.
These vents are a different animal. You'll want a helping hand...trust me.