No to disagree Ian, but just to clarify a couple of points from your comment.
Ian Grose said...
Tristan,
Screw it when you first unpack it and you should never need to unscrew it.
Just keep in mind a board should never be left in extreme heat, if a board is left in a car with its nose up on the dashboard in direct sun on a hot day there is potential to do damage to any board with or without a vent plug.
So in other words - Try not to, but if you're going to have to leave your board in the sun or a car, loosen it.
Also, if you're flying with it - definitely loosen it. I've heard of a few w/surfers delaminating during flights.
Most of us do not loosen them and never have issues.
True, but the screw has a rubber washer (o-ring) that is continually under compression & can perish over time. It doesn't hurt to unscrew it & replace the washer every 12 months or so - just my 2 cents.