i dont believe he has any exit for airjust watch the vid agin .. and actualy looks good .. out take is good ..
but how about your intake ? how is that .. passiv ? or did you fit some tubeings and runn it out to collect fresh/cool air ?
need to see the tent be pulld in when its closed .. not much . just a littel negativ presure .. so your sure no odour will esape once they begin to smell .. but also so your sure it got a good air flow and it pull some fresh air in the passiv intake/tubeings ..
watch vid again