thats the closet in question. each side is 47cm by 47cm, and the filter is 45cm long.. so im going to have mount it verticaly.. the shelves can be adusted in height, and taken out. the middle divider is supporting and cant be removed in any usefull way. so my idea was, to make intake holes on the bottom in the back of the left side. and some ventilation holes in the divider near the top. and the exhaust hole on the right back. i have some white/black foil that im gonna staple onto the walls. would that work? how big do the holes need to be? how would i make these holes? i dont have any power tools besides a powerdrill, but no drills even at the moment. (of course i can buy some stuff if its not too expensive..) any recommendation on a lighttrap for the intake holes maybe (not so important right now, i think i can figure that out. any tipps on making the door gap lightproof? many thanks.