Hey,
see the video you have put up, how does the actual sound compare in real life? is it much louder, is it deeper, raspier etc. a lot of the noise we hear on a vid is dependent on the mic pick up. that video doesn't seem too loud but my brains telling me its loud as hell since you only have mid silencers!
once thing I've been advised is to remove mid silencer and get a berks hfc and leave stock back box. so many options!