And there are some vent holes on the driver side as well (I've never seen anyone mention these ...)!!! 3 holes (approx. 4mm wide) covered from the inside with felt - on the plastic ring part around the driver. Some surely have closed them (without knowing they're there) with their...

And there are some vent holes on the driver side as well (I've never seen anyone mention these ...)!!!   3 holes (approx. 4mm wide) covered from the inside with felt - on the plastic ring part around the driver.   Some surely have closed them...