Today is a massive accomplishment with the kitchen dome closing in. Having forgotten to place the vent tubes in, we had to go back and cut away the earth and bag prior to its hardening.  This worked perfectly - though, without knowledge of proper ‘wind flow dynamics’ we’re just guessing that placing these pipe outflows at the top will actually vent air outward.  At least we’ve tried - it they don’t vent, we can always close the tube up.