looks good systrex. I took a piece of 1x2 and mounted it where the doors meet and then used some foam insulation on it and around the door edges. To help keep the doors closed tightly, i used some cabinet catches. One part is mounted to the door and the other part to the cabinet base and top. I used two sets, they work real good. I also took one shelf and screwed it horizontally from one side of the cabinet to the other in the rear for support as the cabinet was quite shaky without it. as for a lock i got a cheap latch lock and just got a small padlock to lock it. im also going to put some casters on the bottom so i can roll the cabinet around as needed cause moving this thing on carpet is a bitch with no wheels. below is a pic of the catches for the doors.

as for pots i was gonna use 3 10" pots but i think i am going dwc as i can fit (2) 5 gallon buckets in there and will probably do a vertical scrog. I will eventually have to hang the whole light board vertically with some wire by drilling two holes in each end and hang it on hooks screwed into the top of the cabinet. this way my scrog area goes from 30" wide and 18" deep to 30" high(or more) and 30" wide thus increasing my scrogging space. the plants will grow vertically but flower horizontally. hopefully the buds wont get too heavy to need support otherwise ill be tying them up for support. im also gonna take that cardboard backing shit off and get me a piece of white tileboard or a piece of 1/4 plywood and some liquid nails as it will help with the noise reduction.