im goin to grow from seed. i just moved house and i cant find anywhere that sells MDF panels! its doing my head in. yea i plan to have the air in take descending to the bottom of the room and attaching the extractor out at the very top. il post pics as i progress with the room. i polly filled all the cracks yesterday, to day im fitting the 1st layer of sheeting. Im still waiting for the mylar to get here but iv got the norm black/white material.