ok thanks mate, so this is my conclusion so far, ive got a 75x75x160 bud box, gna use a 400w hps dual spec, im going to put in 6 auto hindu kush autos in 6litre pots, ive got biobizz organic soil to put in them, 4" outlet with carbon filter and a 4" inlet fan anything else i need to add? im not...