First auto all done

My first auto came out strong, a little too strong actually. In the last month I tried combinations of 3 NEW quality carbon filters, 2 different exhaust fans and 2 lots of new ducting, rubber clamps, extra tape to seal joints, odor cubes, I even swapped tents. You name it, I tried it. I just couldn't get on top of the smell so I harvested a week early. Jack Herer Auto, (fastbuds), 8.5 litre autopots, coco, liquid nutes with organic additives. 11 weeks from seed. Estimate 4.5 ounces.

If anyone knows why it is so, please tell me! This is round 8 and I've never had such a hard time with odour before.