The DIY carbon filter I built didn't do squat so I bought a can filter. Much better. I wouldn't grow indoors without it unless maybe I lived out in the country somewhere, away from all other noses.
Turdcat-Have you ever tried water curing? Very smooth and removes all odor and taste IME. Try a couple buds to see if it works for you. It's not my favorite but it definitely has it's place for stealth smoking.
I gave water curing a try, 'once'... it comes out like plastic. yes it didnt smell as much but!!! Vaporizor! no cannabis smell from vapeing, more like popcorn.